feat: Add registry settings for Connections and SQL Server settings

- Added registry settings for the Connection Page.
- Added registry settings for the SQL Serverl Page.
- All settings implemented with async registry logic
- Comment unused settings for Connection Page
- Update documents

mRemoteNG/Config/Settings/Registry/OptRegistryConnectionsPage.cs

@@ -0,0 +1,178 @@
+using System.Runtime.Versioning;
+using Microsoft.Win32;
+using mRemoteNG.App.Info;
+using mRemoteNG.Tools.WindowsRegistry;
+
+namespace mRemoteNG.Config.Settings.Registry
+{
+    [SupportedOSPlatform("windows")]
+    public sealed partial class OptRegistryConnectionsPage
+    {
+        /// <summary>
+        /// Specifies whether to single click to connection opens/establishes connection
+        /// </summary>
+        public WinRegistryEntry<bool> SingleClickOnConnectionOpensIt { get; private set; }
+
+        /// <summary>
+        /// Specifies whether a single click on an open connection switches the focused tab to that connection.
+        /// </summary>
+        public WinRegistryEntry<bool> SingleClickSwitchesToOpenConnection { get; private set; }
+
+        /// <summary>
+        /// Specifies whether to track open connections in the connection tree.
+        /// </summary>
+        public WinRegistryEntry<bool> TrackActiveConnectionInConnectionTree { get; private set; }
+
+        /// <summary>
+        /// Specifies whether to set the hostname like the display name when creating or renaming a connection.
+        /// </summary>
+        public WinRegistryEntry<bool> SetHostnameLikeDisplayName { get; private set; }
+
+        /// <summary>
+        /// Specifies whether filter matches in the search are applied in the connection tree.
+        /// </summary>
+        public WinRegistryEntry<bool> UseFilterSearch { get; private set; }
+
+        /// <summary>
+        /// Specifies whether the search bar is placed above the connection tree.
+        /// </summary>
+        public WinRegistryEntry<bool> PlaceSearchBarAboveConnectionTree { get; private set; }
+
+        /// <summary>
+        /// Specifies whether the username trimming is disabled.
+        /// </summary>
+        public WinRegistryEntry<bool> DoNotTrimUsername { get; private set; }
+
+        /// <summary>
+        /// Specifies the number of RDP reconnections.
+        /// </summary>
+        public WinRegistryEntry<int> RdpReconnectionCount { get; private set; }
+
+        /// <summary>
+        /// Specifies the overall connection timeout for RDP connections.
+        /// </summary>
+        public WinRegistryEntry<int> ConRDPOverallConnectionTimeout { get; private set; }
+
+        /// <summary>
+        /// Specifies the autosave interval in minutes. 
+        /// </summary>
+        public WinRegistryEntry<int> AutoSaveEveryMinutes { get; private set; }
+
+        public OptRegistryConnectionsPage()
+        {
+            RegistryHive hive = WindowsRegistryInfo.Hive;
+            string subKey = WindowsRegistryInfo.ConnectionOptions;
+
+            SingleClickOnConnectionOpensIt = new WinRegistryEntry<bool>(hive, subKey, nameof(SingleClickOnConnectionOpensIt)).Read();
+            SingleClickSwitchesToOpenConnection = new WinRegistryEntry<bool>(hive, subKey, nameof(SingleClickSwitchesToOpenConnection)).Read();
+            TrackActiveConnectionInConnectionTree = new WinRegistryEntry<bool>(hive, subKey, nameof(TrackActiveConnectionInConnectionTree)).Read();
+            SetHostnameLikeDisplayName = new WinRegistryEntry<bool>(hive, subKey, nameof(SetHostnameLikeDisplayName)).Read();
+            UseFilterSearch = new WinRegistryEntry<bool>(hive, subKey, nameof(UseFilterSearch)).Read();
+            PlaceSearchBarAboveConnectionTree = new WinRegistryEntry<bool>(hive, subKey, nameof(PlaceSearchBarAboveConnectionTree)).Read();
+            DoNotTrimUsername = new WinRegistryEntry<bool>(hive, subKey, nameof(DoNotTrimUsername)).Read();
+            RdpReconnectionCount = new WinRegistryEntry<int>(hive, subKey, nameof(RdpReconnectionCount)).Read();
+            ConRDPOverallConnectionTimeout = new WinRegistryEntry<int>(hive, subKey, nameof(ConRDPOverallConnectionTimeout)).Read();
+            AutoSaveEveryMinutes = new WinRegistryEntry<int>(hive, subKey, nameof(AutoSaveEveryMinutes)).Read();
+
+            SetupValidation();
+            Apply();
+        }
+
+        /// <summary>
+        /// Configures validation settings for various parameters
+        /// </summary>
+        private void SetupValidation()
+        {
+            var connectionsPage = new UI.Forms.OptionsPages.ConnectionsPage();
+
+            int ConRDPOverallConnectionTimeoutMin = (int)connectionsPage.numRDPConTimeout.Minimum;
+            int ConRDPOverallConnectionTimeoutMax = (int)connectionsPage.numRDPConTimeout.Maximum;
+            ConRDPOverallConnectionTimeout.SetValidation(ConRDPOverallConnectionTimeoutMin, ConRDPOverallConnectionTimeoutMax);
+
+            int numAutoSaveMin = (int)connectionsPage.numAutoSave.Minimum;
+            int numAutoSaveMax = (int)connectionsPage.numAutoSave.Maximum;
+            AutoSaveEveryMinutes.SetValidation(numAutoSaveMin, numAutoSaveMax);
+
+            int RdpReconnectionCountMin = (int)connectionsPage.numRdpReconnectionCount.Minimum;
+            int RdpReconnectionCountMax = (int)connectionsPage.numRdpReconnectionCount.Maximum;
+            RdpReconnectionCount.SetValidation(RdpReconnectionCountMin, RdpReconnectionCountMax);
+        }
+
+        /// <summary>
+        /// Applies registry settings and overrides various properties.
+        /// </summary>
+        private void Apply()
+        {
+            ApplySingleClickOnConnectionOpensIt();
+            ApplySingleClickSwitchesToOpenConnection();
+            ApplyTrackActiveConnectionInConnectionTree();
+            ApplySetHostnameLikeDisplayName();
+            ApplyUseFilterSearch();
+            ApplyPlaceSearchBarAboveConnectionTree();
+            ApplyDoNotTrimUsername();
+            ApplyRdpReconnectionCount();
+            ApplyConRDPOverallConnectionTimeout();
+            ApplyAutoSaveEveryMinutes();
+        }
+
+        private void ApplySingleClickOnConnectionOpensIt()
+        {
+            if (SingleClickOnConnectionOpensIt.IsSet)
+                Properties.Settings.Default.SingleClickOnConnectionOpensIt = SingleClickOnConnectionOpensIt.Value;
+        }
+
+        private void ApplySingleClickSwitchesToOpenConnection()
+        {
+            if (SingleClickSwitchesToOpenConnection.IsSet)
+                 Properties.Settings.Default.SingleClickSwitchesToOpenConnection = SingleClickSwitchesToOpenConnection.Value;
+        }
+
+        private void ApplyTrackActiveConnectionInConnectionTree()
+        {
+            if (TrackActiveConnectionInConnectionTree.IsSet)
+                Properties.Settings.Default.TrackActiveConnectionInConnectionTree = TrackActiveConnectionInConnectionTree.Value;
+        }
+
+        private void ApplySetHostnameLikeDisplayName()
+        {
+            if (SetHostnameLikeDisplayName.IsSet)
+                Properties.Settings.Default.SetHostnameLikeDisplayName = SetHostnameLikeDisplayName.Value;
+        }
+
+        private void ApplyUseFilterSearch()
+        {
+            if (UseFilterSearch.IsSet)
+                Properties.Settings.Default.UseFilterSearch = UseFilterSearch.Value;
+        }
+
+        private void ApplyPlaceSearchBarAboveConnectionTree()
+        {
+            if (PlaceSearchBarAboveConnectionTree.IsSet)
+                Properties.Settings.Default.PlaceSearchBarAboveConnectionTree = PlaceSearchBarAboveConnectionTree.Value;
+        }
+
+        private void ApplyDoNotTrimUsername()
+        {
+            if (DoNotTrimUsername.IsSet)
+                Properties.Settings.Default.DoNotTrimUsername = DoNotTrimUsername.Value;
+        }
+
+        private void ApplyRdpReconnectionCount()
+        {
+            if (RdpReconnectionCount.IsValid)
+                Properties.Settings.Default.RdpReconnectionCount = RdpReconnectionCount.Value;
+        }
+
+        private void ApplyConRDPOverallConnectionTimeout()
+        {
+            if (ConRDPOverallConnectionTimeout.IsValid)
+                Properties.Settings.Default.ConRDPOverallConnectionTimeout = ConRDPOverallConnectionTimeout.Value;
+        }
+
+        private void ApplyAutoSaveEveryMinutes()
+        {
+            if (AutoSaveEveryMinutes.IsValid)
+                Properties.OptionsBackupPage.Default.AutoSaveEveryMinutes = AutoSaveEveryMinutes.Value;
+        }
+    }
+}

mRemoteNG/Config/Settings/Registry/OptRegistrySqlServerPage.cs

@@ -0,0 +1,154 @@
+using System.Runtime.Versioning;
+using Microsoft.Win32;
+using mRemoteNG.App;
+using mRemoteNG.App.Info;
+using mRemoteNG.Security.SymmetricEncryption;
+using mRemoteNG.Tools.WindowsRegistry;
+
+namespace mRemoteNG.Config.Settings.Registry
+{
+    [SupportedOSPlatform("windows")]
+    public sealed partial class OptRegistrySqlServerPage
+    {
+        /// <summary>
+        /// Specifies whether SQL Server is being used.
+        /// </summary>
+        public WinRegistryEntry<bool> UseSQLServer { get; private set; }
+
+        /// <summary>
+        /// Specifies the type of SQL Server being used.
+        /// </summary>
+        public WinRegistryEntry<string> SQLServerType { get; private set; }
+
+        /// <summary>
+        /// Specifies the host of the SQL Server.
+        /// </summary>
+        public WinRegistryEntry<string> SQLHost { get; private set; }
+
+        /// <summary>
+        /// Specifies the name/instance of the SQL database.
+        /// </summary>
+        public WinRegistryEntry<string> SQLDatabaseName { get; private set; }
+
+        /// <summary>
+        /// Specifies the username for accessing the SQL Server.
+        /// </summary>
+        public WinRegistryEntry<string> SQLUser { get; private set; }
+
+        /// <summary>
+        /// Specifies the password for accessing the SQL Server.
+        /// </summary>
+        public WinRegistryEntry<string> SQLPassword { get; private set; }
+
+        /// <summary>
+        /// Specifies whether the SQL connection is read-only.
+        /// </summary>
+        public WinRegistryEntry<bool> SQLReadOnly { get; private set; }
+
+        public OptRegistrySqlServerPage()
+        {
+            RegistryHive hive = WindowsRegistryInfo.Hive;
+            string subKey = WindowsRegistryInfo.SQLServerOptions;
+
+            UseSQLServer = new WinRegistryEntry<bool>(hive, subKey, nameof(UseSQLServer)).Read();
+            SQLServerType = new WinRegistryEntry<string>(hive, subKey, nameof(SQLServerType)).Read();
+            SQLHost = new WinRegistryEntry<string>(hive, subKey, nameof(SQLHost)).Read();
+            SQLDatabaseName = new WinRegistryEntry<string>(hive, subKey, nameof(SQLDatabaseName)).Read();
+            SQLUser = new WinRegistryEntry<string>(hive, subKey, nameof(SQLUser)).Read();
+            SQLPassword = new WinRegistryEntry<string>(hive, subKey, nameof(SQLPassword)).Read();
+            SQLReadOnly = new WinRegistryEntry<bool>(hive, subKey, nameof(SQLReadOnly)).Read();
+
+            SetupValidation();
+            Apply();
+        }
+
+        /// <summary>
+        /// Configures validation settings for various parameters
+        /// </summary>
+        private void SetupValidation()
+        {
+            SQLServerType.SetValidation(
+                new string[] {
+                    "mssql",
+                    "mysql"
+                });
+        }
+
+        /// <summary>
+        /// Applies registry settings and overrides various properties.
+        /// </summary>
+        private void Apply()
+        {
+            if (!UseSQLServer.IsSet) { return; }
+
+            ApplyUseSQLServer();
+
+            if (!Properties.OptionsDBsPage.Default.UseSQLServer) { return; }
+
+            ApplySQLServerType();
+            ApplySQLHost();
+            ApplySQLDatabaseName();
+            ApplySQLUser();
+            ApplySQLPassword();
+            ApplySQLReadOnly();
+        }
+
+        private void ApplyUseSQLServer()
+        {
+            Properties.OptionsDBsPage.Default.UseSQLServer = UseSQLServer.Value;
+        }
+
+        private void ApplySQLServerType()
+        {
+            if (SQLServerType.IsValid)
+                Properties.OptionsDBsPage.Default.SQLServerType = SQLServerType.Value;
+            
+        }
+
+        private void ApplySQLHost()
+        {
+            if (SQLHost.IsSet)
+                Properties.OptionsDBsPage.Default.SQLHost = SQLHost.Value;
+        }
+
+        private void ApplySQLDatabaseName()
+        {
+            if (SQLDatabaseName.IsSet)
+                Properties.OptionsDBsPage.Default.SQLDatabaseName = SQLDatabaseName.Value;
+            
+        }
+
+        private void ApplySQLUser()
+        {
+            if (SQLUser.IsSet)
+                Properties.OptionsDBsPage.Default.SQLUser = SQLUser.Value;
+        }
+
+        private void ApplySQLPassword()
+        {
+            if (SQLPassword.IsSet)
+            {
+                // Prevents potential issues when using SQLPass later.
+                try
+                {
+                    LegacyRijndaelCryptographyProvider cryptographyProvider = new();
+                    string decryptedPassword;
+                    string sqlPassword = SQLPassword.Value;
+                    decryptedPassword = cryptographyProvider.Decrypt(sqlPassword, Runtime.EncryptionKey);
+
+                    Properties.OptionsDBsPage.Default.SQLPass = sqlPassword;
+                }
+                catch
+                {
+                    // Fire-and-forget: The password in the registry is not encrypted.
+                }
+            }
+        }
+
+        private void ApplySQLReadOnly()
+        {
+            if (SQLReadOnly.IsSet)
+                Properties.OptionsDBsPage.Default.SQLReadOnly = SQLReadOnly.Value;
+        }
+    }
+}

mRemoteNG/UI/Forms/OptionsPages/ConnectionsPage.Designer.cs

@@ -54,17 +54,20 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             chkPlaceSearchBarAboveConnectionTree = new MrngCheckBox();
             chkConnectionTreeTrackActiveConnection = new MrngCheckBox();
             chkDoNotTrimUsername = new MrngCheckBox();
+            pnlOptions = new System.Windows.Forms.Panel();
+            lblRegistrySettingsUsedInfo = new System.Windows.Forms.Label();
             ((System.ComponentModel.ISupportInitialize)numRDPConTimeout).BeginInit();
             ((System.ComponentModel.ISupportInitialize)numRdpReconnectionCount).BeginInit();
             ((System.ComponentModel.ISupportInitialize)numAutoSave).BeginInit();
             pnlConfirmCloseConnection.SuspendLayout();
             tableLayoutPanel2.SuspendLayout();
+            pnlOptions.SuspendLayout();
             SuspendLayout();
             // 
             // numRDPConTimeout
             // 
             numRDPConTimeout.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
-            numRDPConTimeout.Location = new System.Drawing.Point(274, 29);
+            numRDPConTimeout.Location = new System.Drawing.Point(277, 29);
             numRDPConTimeout.Maximum = new decimal(new int[] { 600, 0, 0, 0 });
             numRDPConTimeout.Minimum = new decimal(new int[] { 20, 0, 0, 0 });
             numRDPConTimeout.Name = "numRDPConTimeout";
@@ -77,7 +80,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             lblRDPConTimeout.Dock = System.Windows.Forms.DockStyle.Top;
             lblRDPConTimeout.Location = new System.Drawing.Point(3, 26);
             lblRDPConTimeout.Name = "lblRDPConTimeout";
-            lblRDPConTimeout.Size = new System.Drawing.Size(265, 26);
+            lblRDPConTimeout.Size = new System.Drawing.Size(268, 26);
             lblRDPConTimeout.TabIndex = 0;
             lblRDPConTimeout.Text = "RDP Connection Timeout";
             lblRDPConTimeout.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
@@ -87,7 +90,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             lblRdpReconnectionCount.Dock = System.Windows.Forms.DockStyle.Top;
             lblRdpReconnectionCount.Location = new System.Drawing.Point(3, 0);
             lblRdpReconnectionCount.Name = "lblRdpReconnectionCount";
-            lblRdpReconnectionCount.Size = new System.Drawing.Size(265, 26);
+            lblRdpReconnectionCount.Size = new System.Drawing.Size(268, 26);
             lblRdpReconnectionCount.TabIndex = 0;
             lblRdpReconnectionCount.Text = "RDP Reconnection Count";
             lblRdpReconnectionCount.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
@@ -95,7 +98,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             // numRdpReconnectionCount
             // 
             numRdpReconnectionCount.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
-            numRdpReconnectionCount.Location = new System.Drawing.Point(274, 3);
+            numRdpReconnectionCount.Location = new System.Drawing.Point(277, 3);
             numRdpReconnectionCount.Maximum = new decimal(new int[] { 20, 0, 0, 0 });
             numRdpReconnectionCount.Name = "numRdpReconnectionCount";
             numRdpReconnectionCount.Size = new System.Drawing.Size(53, 22);
@@ -107,7 +110,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             chkSingleClickOnConnectionOpensIt._mice = MrngCheckBox.MouseState.OUT;
             chkSingleClickOnConnectionOpensIt.AutoSize = true;
             chkSingleClickOnConnectionOpensIt.Font = new System.Drawing.Font("Segoe UI", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
-            chkSingleClickOnConnectionOpensIt.Location = new System.Drawing.Point(3, 3);
+            chkSingleClickOnConnectionOpensIt.Location = new System.Drawing.Point(6, 3);
             chkSingleClickOnConnectionOpensIt.Name = "chkSingleClickOnConnectionOpensIt";
             chkSingleClickOnConnectionOpensIt.Size = new System.Drawing.Size(206, 17);
             chkSingleClickOnConnectionOpensIt.TabIndex = 0;
@@ -119,7 +122,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             chkHostnameLikeDisplayName._mice = MrngCheckBox.MouseState.OUT;
             chkHostnameLikeDisplayName.AutoSize = true;
             chkHostnameLikeDisplayName.Font = new System.Drawing.Font("Segoe UI", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
-            chkHostnameLikeDisplayName.Location = new System.Drawing.Point(3, 72);
+            chkHostnameLikeDisplayName.Location = new System.Drawing.Point(6, 72);
             chkHostnameLikeDisplayName.Name = "chkHostnameLikeDisplayName";
             chkHostnameLikeDisplayName.Size = new System.Drawing.Size(355, 17);
             chkHostnameLikeDisplayName.TabIndex = 2;
@@ -131,7 +134,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             chkSingleClickOnOpenedConnectionSwitchesToIt._mice = MrngCheckBox.MouseState.OUT;
             chkSingleClickOnOpenedConnectionSwitchesToIt.AutoSize = true;
             chkSingleClickOnOpenedConnectionSwitchesToIt.Font = new System.Drawing.Font("Segoe UI", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
-            chkSingleClickOnOpenedConnectionSwitchesToIt.Location = new System.Drawing.Point(3, 26);
+            chkSingleClickOnOpenedConnectionSwitchesToIt.Location = new System.Drawing.Point(6, 26);
             chkSingleClickOnOpenedConnectionSwitchesToIt.Name = "chkSingleClickOnOpenedConnectionSwitchesToIt";
             chkSingleClickOnOpenedConnectionSwitchesToIt.Size = new System.Drawing.Size(492, 17);
             chkSingleClickOnOpenedConnectionSwitchesToIt.TabIndex = 1;
@@ -143,7 +146,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             lblAutoSave1.Dock = System.Windows.Forms.DockStyle.Top;
             lblAutoSave1.Location = new System.Drawing.Point(3, 52);
             lblAutoSave1.Name = "lblAutoSave1";
-            lblAutoSave1.Size = new System.Drawing.Size(265, 26);
+            lblAutoSave1.Size = new System.Drawing.Size(268, 26);
             lblAutoSave1.TabIndex = 0;
             lblAutoSave1.Text = "Auto Save  in Minutes (0 means disabled)";
             lblAutoSave1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
@@ -151,7 +154,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             // numAutoSave
             // 
             numAutoSave.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
-            numAutoSave.Location = new System.Drawing.Point(274, 55);
+            numAutoSave.Location = new System.Drawing.Point(277, 55);
             numAutoSave.Maximum = new decimal(new int[] { 9999, 0, 0, 0 });
             numAutoSave.Name = "numAutoSave";
             numAutoSave.Size = new System.Drawing.Size(53, 22);
@@ -164,9 +167,10 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             pnlConfirmCloseConnection.Controls.Add(radCloseWarnMultiple);
             pnlConfirmCloseConnection.Controls.Add(radCloseWarnExit);
             pnlConfirmCloseConnection.Controls.Add(radCloseWarnNever);
-            pnlConfirmCloseConnection.Location = new System.Drawing.Point(3, 270);
+            pnlConfirmCloseConnection.Dock = System.Windows.Forms.DockStyle.Top;
+            pnlConfirmCloseConnection.Location = new System.Drawing.Point(0, 292);
             pnlConfirmCloseConnection.Name = "pnlConfirmCloseConnection";
-            pnlConfirmCloseConnection.Size = new System.Drawing.Size(604, 137);
+            pnlConfirmCloseConnection.Size = new System.Drawing.Size(610, 133);
             pnlConfirmCloseConnection.TabIndex = 6;
             // 
             // lblClosingConnections
@@ -231,7 +235,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             chkSaveConnectionsAfterEveryEdit._mice = MrngCheckBox.MouseState.OUT;
             chkSaveConnectionsAfterEveryEdit.AutoSize = true;
             chkSaveConnectionsAfterEveryEdit.Font = new System.Drawing.Font("Segoe UI", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
-            chkSaveConnectionsAfterEveryEdit.Location = new System.Drawing.Point(3, 95);
+            chkSaveConnectionsAfterEveryEdit.Location = new System.Drawing.Point(6, 95);
             chkSaveConnectionsAfterEveryEdit.Name = "chkSaveConnectionsAfterEveryEdit";
             chkSaveConnectionsAfterEveryEdit.Size = new System.Drawing.Size(194, 17);
             chkSaveConnectionsAfterEveryEdit.TabIndex = 7;
@@ -243,7 +247,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             chkUseFilterSearch._mice = MrngCheckBox.MouseState.OUT;
             chkUseFilterSearch.AutoSize = true;
             chkUseFilterSearch.Font = new System.Drawing.Font("Segoe UI", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
-            chkUseFilterSearch.Location = new System.Drawing.Point(3, 118);
+            chkUseFilterSearch.Location = new System.Drawing.Point(6, 118);
             chkUseFilterSearch.Name = "chkUseFilterSearch";
             chkUseFilterSearch.Size = new System.Drawing.Size(230, 17);
             chkUseFilterSearch.TabIndex = 8;
@@ -261,13 +265,14 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             tableLayoutPanel2.Controls.Add(lblAutoSave1, 0, 2);
             tableLayoutPanel2.Controls.Add(lblRDPConTimeout, 0, 1);
             tableLayoutPanel2.Controls.Add(numRDPConTimeout, 1, 1);
-            tableLayoutPanel2.Location = new System.Drawing.Point(3, 185);
+            tableLayoutPanel2.Dock = System.Windows.Forms.DockStyle.Top;
+            tableLayoutPanel2.Location = new System.Drawing.Point(0, 213);
             tableLayoutPanel2.Name = "tableLayoutPanel2";
             tableLayoutPanel2.RowCount = 3;
             tableLayoutPanel2.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 26F));
             tableLayoutPanel2.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 26F));
             tableLayoutPanel2.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 26F));
-            tableLayoutPanel2.Size = new System.Drawing.Size(604, 79);
+            tableLayoutPanel2.Size = new System.Drawing.Size(610, 79);
             tableLayoutPanel2.TabIndex = 9;
             // 
             // chkPlaceSearchBarAboveConnectionTree
@@ -275,7 +280,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             chkPlaceSearchBarAboveConnectionTree._mice = MrngCheckBox.MouseState.OUT;
             chkPlaceSearchBarAboveConnectionTree.AutoSize = true;
             chkPlaceSearchBarAboveConnectionTree.Font = new System.Drawing.Font("Segoe UI", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
-            chkPlaceSearchBarAboveConnectionTree.Location = new System.Drawing.Point(3, 141);
+            chkPlaceSearchBarAboveConnectionTree.Location = new System.Drawing.Point(6, 141);
             chkPlaceSearchBarAboveConnectionTree.Name = "chkPlaceSearchBarAboveConnectionTree";
             chkPlaceSearchBarAboveConnectionTree.Size = new System.Drawing.Size(226, 17);
             chkPlaceSearchBarAboveConnectionTree.TabIndex = 8;
@@ -287,7 +292,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             chkConnectionTreeTrackActiveConnection._mice = MrngCheckBox.MouseState.OUT;
             chkConnectionTreeTrackActiveConnection.AutoSize = true;
             chkConnectionTreeTrackActiveConnection.Font = new System.Drawing.Font("Segoe UI", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
-            chkConnectionTreeTrackActiveConnection.Location = new System.Drawing.Point(3, 49);
+            chkConnectionTreeTrackActiveConnection.Location = new System.Drawing.Point(6, 49);
             chkConnectionTreeTrackActiveConnection.Name = "chkConnectionTreeTrackActiveConnection";
             chkConnectionTreeTrackActiveConnection.Size = new System.Drawing.Size(262, 17);
             chkConnectionTreeTrackActiveConnection.TabIndex = 10;
@@ -299,27 +304,50 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             chkDoNotTrimUsername._mice = MrngCheckBox.MouseState.OUT;
             chkDoNotTrimUsername.AutoSize = true;
             chkDoNotTrimUsername.Font = new System.Drawing.Font("Segoe UI", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
-            chkDoNotTrimUsername.Location = new System.Drawing.Point(3, 165);
+            chkDoNotTrimUsername.Location = new System.Drawing.Point(6, 165);
             chkDoNotTrimUsername.Name = "chkDoNotTrimUsername";
             chkDoNotTrimUsername.Size = new System.Drawing.Size(143, 17);
             chkDoNotTrimUsername.TabIndex = 11;
             chkDoNotTrimUsername.Text = "Do not trim usernames";
             chkDoNotTrimUsername.UseVisualStyleBackColor = true;
             // 
+            // pnlOptions
+            // 
+            pnlOptions.Controls.Add(chkSingleClickOnConnectionOpensIt);
+            pnlOptions.Controls.Add(chkDoNotTrimUsername);
+            pnlOptions.Controls.Add(chkSingleClickOnOpenedConnectionSwitchesToIt);
+            pnlOptions.Controls.Add(chkConnectionTreeTrackActiveConnection);
+            pnlOptions.Controls.Add(chkHostnameLikeDisplayName);
+            pnlOptions.Controls.Add(chkSaveConnectionsAfterEveryEdit);
+            pnlOptions.Controls.Add(chkPlaceSearchBarAboveConnectionTree);
+            pnlOptions.Controls.Add(chkUseFilterSearch);
+            pnlOptions.Dock = System.Windows.Forms.DockStyle.Top;
+            pnlOptions.Location = new System.Drawing.Point(0, 30);
+            pnlOptions.Name = "pnlOptions";
+            pnlOptions.Size = new System.Drawing.Size(610, 183);
+            pnlOptions.TabIndex = 12;
+            // 
+            // lblRegistrySettingsUsedInfo
+            // 
+            lblRegistrySettingsUsedInfo.BackColor = System.Drawing.SystemColors.ControlLight;
+            lblRegistrySettingsUsedInfo.Dock = System.Windows.Forms.DockStyle.Top;
+            lblRegistrySettingsUsedInfo.ForeColor = System.Drawing.SystemColors.ControlText;
+            lblRegistrySettingsUsedInfo.Location = new System.Drawing.Point(0, 0);
+            lblRegistrySettingsUsedInfo.Name = "lblRegistrySettingsUsedInfo";
+            lblRegistrySettingsUsedInfo.Padding = new System.Windows.Forms.Padding(0, 2, 0, 0);
+            lblRegistrySettingsUsedInfo.Size = new System.Drawing.Size(610, 30);
+            lblRegistrySettingsUsedInfo.TabIndex = 13;
+            lblRegistrySettingsUsedInfo.Text = "Some settings are configured by your Administrator. Please contact your administrator for more information.";
+            lblRegistrySettingsUsedInfo.Visible = false;
+            // 
             // ConnectionsPage
             // 
             AutoScaleDimensions = new System.Drawing.SizeF(96F, 96F);
             AutoScaleMode = System.Windows.Forms.AutoScaleMode.Dpi;
-            Controls.Add(chkDoNotTrimUsername);
-            Controls.Add(chkConnectionTreeTrackActiveConnection);
-            Controls.Add(tableLayoutPanel2);
-            Controls.Add(chkPlaceSearchBarAboveConnectionTree);
-            Controls.Add(chkUseFilterSearch);
-            Controls.Add(chkSaveConnectionsAfterEveryEdit);
-            Controls.Add(chkSingleClickOnConnectionOpensIt);
-            Controls.Add(chkHostnameLikeDisplayName);
-            Controls.Add(chkSingleClickOnOpenedConnectionSwitchesToIt);
             Controls.Add(pnlConfirmCloseConnection);
+            Controls.Add(tableLayoutPanel2);
+            Controls.Add(pnlOptions);
+            Controls.Add(lblRegistrySettingsUsedInfo);
             Name = "ConnectionsPage";
             Size = new System.Drawing.Size(610, 490);
             ((System.ComponentModel.ISupportInitialize)numRDPConTimeout).EndInit();
@@ -328,8 +356,9 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             pnlConfirmCloseConnection.ResumeLayout(false);
             pnlConfirmCloseConnection.PerformLayout();
             tableLayoutPanel2.ResumeLayout(false);
+            pnlOptions.ResumeLayout(false);
+            pnlOptions.PerformLayout();
             ResumeLayout(false);
-            PerformLayout();
         }
 
         internal Controls.MrngLabel lblRdpReconnectionCount;
@@ -353,5 +382,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
         private MrngCheckBox chkPlaceSearchBarAboveConnectionTree;
         private MrngCheckBox chkConnectionTreeTrackActiveConnection;
         private MrngCheckBox chkDoNotTrimUsername;
+        internal System.Windows.Forms.Panel pnlOptions;
+        internal System.Windows.Forms.Label lblRegistrySettingsUsedInfo;
     }
 }

mRemoteNG/UI/Forms/OptionsPages/ConnectionsPage.cs

@@ -1,24 +1,38 @@
-using mRemoteNG.Config;
-using System;
-using System.Collections.Generic;
+using System;
 using mRemoteNG.Config.Connections;
 using mRemoteNG.Properties;
 using mRemoteNG.Resources.Language;
 using System.Runtime.Versioning;
+using mRemoteNG.Config.Settings.Registry;
 
 namespace mRemoteNG.UI.Forms.OptionsPages
 {
     [SupportedOSPlatform("windows")]
     public sealed partial class ConnectionsPage
     {
+        #region Private Fields
+        private OptRegistryConnectionsPage pageRegSettingsInstance;
         private readonly FrmMain _frmMain = FrmMain.Default;
-        private List<DropdownList> _connectionWarning;
+
+        // never used, added: Jun 15, 2024
+        //private List<DropdownList> _connectionWarning;  
+
+        #endregion
 
         public ConnectionsPage()
         {
             InitializeComponent();
             ApplyTheme();
             PageIcon = Resources.ImageConverter.GetImageAsIcon(Properties.Resources.ASPWebSite_16x);
+
+            /* 
+             * Comments added: Jun 15, 2024 
+             * These settings are not used on the settings page. It doesn't matter if they are set or not; nothing happens:
+             * 1) chkSaveConnectionsAfterEveryEdit: never used
+             * 2) pnlConfirmCloseConnection: seems to be unfinished. _connectionWarning or other corresponding settings are not available.
+            */
+            chkSaveConnectionsAfterEveryEdit.Visible = false; // Temporary hide control, never used, added: Jun 15, 2024 
+            pnlConfirmCloseConnection.Visible = false; // Temporary hide control, never used, added: Jun 15, 2024 
         }
 
         public override string PageName
@@ -31,13 +45,18 @@ namespace mRemoteNG.UI.Forms.OptionsPages
         {
             base.ApplyLanguage();
 
-            _connectionWarning = new List<DropdownList>
+            /* 
+             * Comments added: Jun 15, 2024
+             * 
+             * Seems to be unfinished or old
+             */
+            /*_connectionWarning = new List<DropdownList>
             {
                 { new DropdownList((int)ConfirmCloseEnum.Never, Language.RadioCloseWarnMultiple)},
                 { new DropdownList((int)ConfirmCloseEnum.Exit, Language.RadioCloseWarnExit)},
                 { new DropdownList((int)ConfirmCloseEnum.Multiple, Language.RadioCloseWarnMultiple)},
                 { new DropdownList((int)ConfirmCloseEnum.All, Language._CloseWarnAll)}
-            };
+            };*/
 
             //comboBoxConnectionWarning.DataSource = _connectionWarning;
             //comboBoxConnectionWarning.DisplayMember = "DisplayString";
@@ -56,6 +75,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             lblAutoSave1.Text = Language.AutoSaveEvery;
             //ngLabel1.Text = Language.strLabelClosingConnections;
 
+            lblRegistrySettingsUsedInfo.Text = Language.OptionsCompanyPolicyMessage;
         }
 
         public override void LoadSettings()
@@ -118,5 +138,67 @@ namespace mRemoteNG.UI.Forms.OptionsPages
 
             //Settings.Default.ConfirmCloseConnection = (int)comboBoxConnectionWarning.SelectedValue;
         }
+
+        public override void LoadRegistrySettings()
+        {
+            Type settingsType = typeof(OptRegistryConnectionsPage);
+            RegistryLoader.RegistrySettings.TryGetValue(settingsType, out var settings);
+            pageRegSettingsInstance = settings as OptRegistryConnectionsPage;
+
+            RegistryLoader.Cleanup(settingsType);
+
+            // ***
+            // Disable controls based on the registry settings.
+            //
+            if (pageRegSettingsInstance.SingleClickOnConnectionOpensIt.IsSet)
+                DisableControl(chkSingleClickOnConnectionOpensIt);
+
+            if (pageRegSettingsInstance.SingleClickSwitchesToOpenConnection.IsSet)
+                DisableControl(chkSingleClickOnOpenedConnectionSwitchesToIt);
+
+            if (pageRegSettingsInstance.TrackActiveConnectionInConnectionTree.IsSet)
+                DisableControl(chkConnectionTreeTrackActiveConnection);
+
+            if (pageRegSettingsInstance.SetHostnameLikeDisplayName.IsSet)
+                DisableControl(chkHostnameLikeDisplayName);
+
+            if (pageRegSettingsInstance.UseFilterSearch.IsSet)
+                DisableControl(chkUseFilterSearch);
+
+            if (pageRegSettingsInstance.PlaceSearchBarAboveConnectionTree.IsSet)
+                DisableControl(chkPlaceSearchBarAboveConnectionTree);
+
+            if (pageRegSettingsInstance.DoNotTrimUsername.IsSet)
+                DisableControl(chkDoNotTrimUsername);
+
+            if (pageRegSettingsInstance.RdpReconnectionCount.IsSet)
+                DisableControl(numRdpReconnectionCount);
+
+            if (pageRegSettingsInstance.ConRDPOverallConnectionTimeout.IsSet)
+                DisableControl(numRDPConTimeout);
+
+            if (pageRegSettingsInstance.AutoSaveEveryMinutes.IsSet)
+                DisableControl(numAutoSave);
+
+            // Updates the visibility of the information label indicating whether registry settings are used.
+            lblRegistrySettingsUsedInfo.Visible = ShowRegistrySettingsUsedInfo();
+        }
+
+        /// <summary>
+        /// Checks if specific registry settings related to appearence page are used.
+        /// </summary>
+        public bool ShowRegistrySettingsUsedInfo()
+        {
+            return pageRegSettingsInstance.SingleClickOnConnectionOpensIt.IsSet
+                || pageRegSettingsInstance.SingleClickSwitchesToOpenConnection.IsSet
+                || pageRegSettingsInstance.TrackActiveConnectionInConnectionTree.IsSet
+                || pageRegSettingsInstance.SetHostnameLikeDisplayName.IsSet
+                || pageRegSettingsInstance.UseFilterSearch.IsSet
+                || pageRegSettingsInstance.PlaceSearchBarAboveConnectionTree.IsSet
+                || pageRegSettingsInstance.DoNotTrimUsername.IsSet
+                || pageRegSettingsInstance.RdpReconnectionCount.IsSet
+                || pageRegSettingsInstance.ConRDPOverallConnectionTimeout.IsSet
+                || pageRegSettingsInstance.AutoSaveEveryMinutes.IsSet;
+        }
     }
 }

mRemoteNG/UI/Forms/OptionsPages/ConnectionsPage.resx

@@ -1,4 +1,64 @@
-<root>
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema 
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
   <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
     <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
     <xsd:element name="root" msdata:IsDataSet="true">

mRemoteNG/UI/Forms/OptionsPages/SqlServerPage.Designer.cs

@@ -1,6 +1,5 @@
-
-
-using mRemoteNG.UI.Controls;
+using mRemoteNG.UI.Controls;
+using System;
 
 namespace mRemoteNG.UI.Forms.OptionsPages
 {
@@ -37,9 +36,12 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             lblSQLReadOnly = new MrngLabel();
             lblSQLType = new MrngLabel();
             txtSQLType = new MrngComboBox();
-            tableLayoutPanel1 = new System.Windows.Forms.TableLayoutPanel();
+            pnlSQLCon = new System.Windows.Forms.TableLayoutPanel();
+            pnlOptions = new System.Windows.Forms.Panel();
+            lblRegistrySettingsUsedInfo = new System.Windows.Forms.Label();
             ((System.ComponentModel.ISupportInitialize)imgConnectionStatus).BeginInit();
-            tableLayoutPanel1.SuspendLayout();
+            pnlSQLCon.SuspendLayout();
+            pnlOptions.SuspendLayout();
             SuspendLayout();
             // 
             // lblSQLDatabaseName
@@ -69,7 +71,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             chkUseSQLServer._mice = MrngCheckBox.MouseState.OUT;
             chkUseSQLServer.AutoSize = true;
             chkUseSQLServer.Font = new System.Drawing.Font("Segoe UI", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
-            chkUseSQLServer.Location = new System.Drawing.Point(9, 7);
+            chkUseSQLServer.Location = new System.Drawing.Point(3, 3);
             chkUseSQLServer.Name = "chkUseSQLServer";
             chkUseSQLServer.Size = new System.Drawing.Size(244, 17);
             chkUseSQLServer.TabIndex = 2;
@@ -148,7 +150,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             // 
             btnTestConnection._mice = MrngButton.MouseState.OUT;
             btnTestConnection.Enabled = false;
-            btnTestConnection.Location = new System.Drawing.Point(9, 198);
+            btnTestConnection.Location = new System.Drawing.Point(3, 194);
             btnTestConnection.Name = "btnTestConnection";
             btnTestConnection.Size = new System.Drawing.Size(153, 25);
             btnTestConnection.TabIndex = 11;
@@ -159,7 +161,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             // imgConnectionStatus
             // 
             imgConnectionStatus.Image = Properties.Resources.F1Help_16x;
-            imgConnectionStatus.Location = new System.Drawing.Point(169, 203);
+            imgConnectionStatus.Location = new System.Drawing.Point(163, 199);
             imgConnectionStatus.Name = "imgConnectionStatus";
             imgConnectionStatus.Size = new System.Drawing.Size(16, 16);
             imgConnectionStatus.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize;
@@ -169,7 +171,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             // lblTestConnectionResults
             // 
             lblTestConnectionResults.AutoSize = true;
-            lblTestConnectionResults.Location = new System.Drawing.Point(9, 226);
+            lblTestConnectionResults.Location = new System.Drawing.Point(3, 222);
             lblTestConnectionResults.Name = "lblTestConnectionResults";
             lblTestConnectionResults.Size = new System.Drawing.Size(125, 13);
             lblTestConnectionResults.TabIndex = 13;
@@ -214,6 +216,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             txtSQLType._mice = MrngComboBox.MouseState.HOVER;
             txtSQLType.Dock = System.Windows.Forms.DockStyle.Fill;
             txtSQLType.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+            txtSQLType.Enabled = false;
             txtSQLType.FormattingEnabled = true;
             txtSQLType.Items.AddRange(new object[] { "mssql", "mysql" });
             txtSQLType.Location = new System.Drawing.Point(163, 3);
@@ -221,53 +224,78 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             txtSQLType.Size = new System.Drawing.Size(235, 21);
             txtSQLType.TabIndex = 21;
             // 
-            // tableLayoutPanel1
+            // pnlSQLCon
             // 
-            tableLayoutPanel1.ColumnCount = 2;
-            tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Absolute, 160F));
-            tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 100F));
-            tableLayoutPanel1.Controls.Add(lblSQLType, 0, 0);
-            tableLayoutPanel1.Controls.Add(txtSQLType, 1, 0);
-            tableLayoutPanel1.Controls.Add(lblSQLServer, 0, 1);
-            tableLayoutPanel1.Controls.Add(chkSQLReadOnly, 1, 5);
-            tableLayoutPanel1.Controls.Add(lblSQLReadOnly, 0, 5);
-            tableLayoutPanel1.Controls.Add(lblSQLDatabaseName, 0, 2);
-            tableLayoutPanel1.Controls.Add(txtSQLDatabaseName, 1, 2);
-            tableLayoutPanel1.Controls.Add(lblSQLUsername, 0, 3);
-            tableLayoutPanel1.Controls.Add(lblSQLPassword, 0, 4);
-            tableLayoutPanel1.Controls.Add(txtSQLServer, 1, 1);
-            tableLayoutPanel1.Controls.Add(txtSQLPassword, 1, 4);
-            tableLayoutPanel1.Controls.Add(txtSQLUsername, 1, 3);
-            tableLayoutPanel1.Location = new System.Drawing.Point(9, 30);
-            tableLayoutPanel1.Name = "tableLayoutPanel1";
-            tableLayoutPanel1.RowCount = 7;
-            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 26F));
-            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 26F));
-            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 26F));
-            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 26F));
-            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 26F));
-            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 26F));
-            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle());
-            tableLayoutPanel1.Size = new System.Drawing.Size(401, 162);
-            tableLayoutPanel1.TabIndex = 22;
+            pnlSQLCon.ColumnCount = 2;
+            pnlSQLCon.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Absolute, 160F));
+            pnlSQLCon.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 100F));
+            pnlSQLCon.Controls.Add(lblSQLType, 0, 0);
+            pnlSQLCon.Controls.Add(txtSQLType, 1, 0);
+            pnlSQLCon.Controls.Add(lblSQLServer, 0, 1);
+            pnlSQLCon.Controls.Add(chkSQLReadOnly, 1, 5);
+            pnlSQLCon.Controls.Add(lblSQLReadOnly, 0, 5);
+            pnlSQLCon.Controls.Add(lblSQLDatabaseName, 0, 2);
+            pnlSQLCon.Controls.Add(txtSQLDatabaseName, 1, 2);
+            pnlSQLCon.Controls.Add(lblSQLUsername, 0, 3);
+            pnlSQLCon.Controls.Add(lblSQLPassword, 0, 4);
+            pnlSQLCon.Controls.Add(txtSQLServer, 1, 1);
+            pnlSQLCon.Controls.Add(txtSQLPassword, 1, 4);
+            pnlSQLCon.Controls.Add(txtSQLUsername, 1, 3);
+            pnlSQLCon.Enabled = false;
+            pnlSQLCon.Location = new System.Drawing.Point(3, 26);
+            pnlSQLCon.Name = "pnlSQLCon";
+            pnlSQLCon.RowCount = 7;
+            pnlSQLCon.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 26F));
+            pnlSQLCon.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 26F));
+            pnlSQLCon.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 26F));
+            pnlSQLCon.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 26F));
+            pnlSQLCon.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 26F));
+            pnlSQLCon.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 26F));
+            pnlSQLCon.RowStyles.Add(new System.Windows.Forms.RowStyle());
+            pnlSQLCon.Size = new System.Drawing.Size(401, 162);
+            pnlSQLCon.TabIndex = 22;
+            // 
+            // pnlOptions
+            // 
+            pnlOptions.Controls.Add(chkUseSQLServer);
+            pnlOptions.Controls.Add(pnlSQLCon);
+            pnlOptions.Controls.Add(btnTestConnection);
+            pnlOptions.Controls.Add(lblTestConnectionResults);
+            pnlOptions.Controls.Add(imgConnectionStatus);
+            pnlOptions.Dock = System.Windows.Forms.DockStyle.Top;
+            pnlOptions.Location = new System.Drawing.Point(0, 30);
+            pnlOptions.Name = "pnlOptions";
+            pnlOptions.Size = new System.Drawing.Size(610, 329);
+            pnlOptions.TabIndex = 23;
+            // 
+            // lblRegistrySettingsUsedInfo
+            // 
+            lblRegistrySettingsUsedInfo.BackColor = System.Drawing.SystemColors.ControlLight;
+            lblRegistrySettingsUsedInfo.Dock = System.Windows.Forms.DockStyle.Top;
+            lblRegistrySettingsUsedInfo.ForeColor = System.Drawing.SystemColors.ControlText;
+            lblRegistrySettingsUsedInfo.Location = new System.Drawing.Point(0, 0);
+            lblRegistrySettingsUsedInfo.Name = "lblRegistrySettingsUsedInfo";
+            lblRegistrySettingsUsedInfo.Padding = new System.Windows.Forms.Padding(0, 2, 0, 0);
+            lblRegistrySettingsUsedInfo.Size = new System.Drawing.Size(610, 30);
+            lblRegistrySettingsUsedInfo.TabIndex = 24;
+            lblRegistrySettingsUsedInfo.Text = "Some settings are configured by your Administrator. Please contact your administrator for more information.";
+            lblRegistrySettingsUsedInfo.Visible = false;
             // 
             // SqlServerPage
             // 
             AutoScaleDimensions = new System.Drawing.SizeF(96F, 96F);
             AutoScaleMode = System.Windows.Forms.AutoScaleMode.Dpi;
-            Controls.Add(tableLayoutPanel1);
-            Controls.Add(lblTestConnectionResults);
-            Controls.Add(imgConnectionStatus);
-            Controls.Add(btnTestConnection);
-            Controls.Add(chkUseSQLServer);
+            Controls.Add(pnlOptions);
+            Controls.Add(lblRegistrySettingsUsedInfo);
             Margin = new System.Windows.Forms.Padding(4);
             Name = "SqlServerPage";
             Size = new System.Drawing.Size(610, 490);
             ((System.ComponentModel.ISupportInitialize)imgConnectionStatus).EndInit();
-            tableLayoutPanel1.ResumeLayout(false);
-            tableLayoutPanel1.PerformLayout();
+            pnlSQLCon.ResumeLayout(false);
+            pnlSQLCon.PerformLayout();
+            pnlOptions.ResumeLayout(false);
+            pnlOptions.PerformLayout();
             ResumeLayout(false);
-            PerformLayout();
         }
 
         internal Controls.MrngLabel lblSQLDatabaseName;
@@ -286,6 +314,8 @@ namespace mRemoteNG.UI.Forms.OptionsPages
         internal Controls.MrngLabel lblSQLReadOnly;
         internal Controls.MrngLabel lblSQLType;
         private MrngComboBox txtSQLType;
-        private System.Windows.Forms.TableLayoutPanel tableLayoutPanel1;
+        private System.Windows.Forms.TableLayoutPanel pnlSQLCon;
+        private System.Windows.Forms.Panel pnlOptions;
+        internal System.Windows.Forms.Label lblRegistrySettingsUsedInfo;
     }
 }

mRemoteNG/UI/Forms/OptionsPages/SqlServerPage.cs

@@ -6,13 +6,17 @@ using mRemoteNG.Properties;
 using mRemoteNG.Security.SymmetricEncryption;
 using mRemoteNG.Resources.Language;
 using System.Runtime.Versioning;
+using mRemoteNG.Config.Settings.Registry;
 
 namespace mRemoteNG.UI.Forms.OptionsPages
 {
     [SupportedOSPlatform("windows")]
     public sealed partial class SqlServerPage
     {
+        #region Private Fields
+        private OptRegistrySqlServerPage pageRegSettingsInstance;
         private readonly DatabaseConnectionTester _databaseConnectionTester;
+        #endregion
 
         public SqlServerPage()
         {
@@ -42,6 +46,7 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             lblSQLPassword.Text = Language.Password;
             lblSQLReadOnly.Text = Language.ReadOnly;
             btnTestConnection.Text = Language.TestConnection;
+            lblRegistrySettingsUsedInfo.Text = Language.OptionsCompanyPolicyMessage;
         }
 
         public override void LoadSettings()
@@ -77,6 +82,48 @@ namespace mRemoteNG.UI.Forms.OptionsPages
                 DisableSql();
         }
 
+        public override void LoadRegistrySettings()
+        {
+            Type settingsType = typeof(OptRegistrySqlServerPage);
+            RegistryLoader.RegistrySettings.TryGetValue(settingsType, out var settings);
+            pageRegSettingsInstance = settings as OptRegistrySqlServerPage;
+
+            RegistryLoader.Cleanup(settingsType);
+
+            // Skip validation of SQL Server registry settings if not set in the registry.
+            if (!pageRegSettingsInstance.UseSQLServer.IsSet)
+                return;
+
+            // Updates the visibility of the information label indicating whether registry settings are used.
+            lblRegistrySettingsUsedInfo.Visible = true;
+            DisableControl(chkUseSQLServer);
+
+            // End validation of SQL Server registry settings if UseSQLServer is false.
+            if (!Properties.OptionsDBsPage.Default.UseSQLServer)
+                return;
+
+            // ***
+            // Disable controls based on the registry settings.
+            //
+            if (pageRegSettingsInstance.SQLServerType.IsSet)
+                DisableControl(txtSQLType);
+
+            if (pageRegSettingsInstance.SQLHost.IsSet)
+                DisableControl(txtSQLServer);
+
+            if (pageRegSettingsInstance.SQLDatabaseName.IsSet)
+                DisableControl(txtSQLDatabaseName);
+
+            if (pageRegSettingsInstance.SQLUser.IsSet)
+                DisableControl(txtSQLUsername);
+
+            if (pageRegSettingsInstance.SQLPassword.IsSet)
+                DisableControl(txtSQLPassword);
+
+            if (pageRegSettingsInstance.SQLReadOnly.IsSet)
+                DisableControl(chkSQLReadOnly);
+        }
+
         private static void ReinitializeSqlUpdater()
         {
             Runtime.ConnectionsService.RemoteConnectionsSyncronizer?.Dispose();
@@ -96,8 +143,17 @@ namespace mRemoteNG.UI.Forms.OptionsPages
             toggleSQLPageControls(chkUseSQLServer.Checked);
         }
 
+        /// <summary>
+        /// Enable or disable SQL connection page controls based on SQL server settings availability.
+        /// Controls are enabled if corresponding registry settings are not set, allowing user interaction
+        /// when SQL server usage is enabled.
+        /// </summary>
+        /// <param name="useSQLServer">Flag indicating whether SQL server functionality is enabled.</param>
         private void toggleSQLPageControls(bool useSQLServer)
         {
+            if (!chkUseSQLServer.Enabled) return;
+
+            pnlSQLCon.Enabled = useSQLServer;
             lblSQLType.Enabled = useSQLServer;
             lblSQLServer.Enabled = useSQLServer;
             lblSQLDatabaseName.Enabled = useSQLServer;

mRemoteNG/UI/Forms/OptionsPages/SqlServerPage.resx

@@ -1,4 +1,64 @@
-<root>
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema 
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
   <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
     <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
     <xsd:element name="root" msdata:IsDataSet="true">

mRemoteNGDocumentation/registry/connection_settings.rst

@@ -0,0 +1,167 @@
+*******************
+Connection Settings
+*******************
+.. versionadded:: v1.77.3
+
+.. warning::
+    Before proceeding with any changes to the Windows Registry, it is imperative that you carefully read and comprehend the 
+    **Modifying the Registry**, **Restricted Registry Settings** and **Disclaimer** 
+    on :doc:`Registry Settings Infromation <registry_settings_information>`.
+    
+
+Options
+=======
+Configure the options page to modify functionalities as described.
+
+- **Registry Hive:** ``HKEY_LOCAL_MACHINE``
+- **Registry Path:** ``SOFTWARE\mRemoteNG\Connections\Options``
+
+Single Click On Connection To Open
+----------------------------------
+Specifies whether to single click to connection opens/establishes connection
+
+- **Value Name:** ``SingleClickOnConnectionOpensIt``
+- **Value Type:** ``REG_SZ``
+- **Values:**
+
+  - Enable: ``true``
+  - Disable: ``false``
+
+
+Single Click Switches To Open Connection
+----------------------------------------
+Specifies whether a single click on an open connection switches the focused tab to that connection.
+
+- **Value Name:** ``SingleClickSwitchesToOpenConnection``
+- **Value Type:** ``REG_SZ``
+- **Values:**
+
+  - Enable: ``true``
+  - Disable: ``false``
+
+
+Track Active Connection In Connection Tree
+------------------------------------------
+This specifies whether to track open connections in the connection tree. 
+When switching to an active connection, the focus in the tree view will also switch through the connection.
+
+- **Value Name:** ``TrackActiveConnectionInConnectionTree``
+- **Value Type:** ``REG_SZ``
+- **Values:**
+
+  - Enable: ``true``
+  - Disable: ``false``
+
+
+Set Hostname Like Display Name
+------------------------------
+Specifies whether to set the hostname like the display name when creating or renaming a connection.
+
+- **Value Name:** ``SetHostnameLikeDisplayName``
+- **Value Type:** ``REG_SZ``
+- **Values:**
+
+  - Enable: ``true``
+  - Disable: ``false``
+
+
+Use Filter Search
+-----------------
+Specifies whether filters applied in the search are reflected in the connection tree. 
+This determines whether the filter hides connections that do not match (value true) or only highlights those that do match (value false).
+
+- **Value Name:** ``UseFilterSearch``
+- **Value Type:** ``REG_SZ``
+- **Values:**
+
+  - Enable: ``true``
+  - Disable: ``false``
+
+
+Place Search Bar Above Connection Tree
+--------------------------------------
+Specifies whether the search bar is placed above the connection tree.
+
+- **Value Name:** ``PlaceSearchBarAboveConnectionTree``
+- **Value Type:** ``REG_SZ``
+- **Values:**
+
+  - Enable: ``true``
+  - Disable: ``false``
+
+
+Do Not Trim Username
+--------------------
+Specifies whether username trimming is enabled or disabled. 
+If ``true``, spaces at the beginning or end of a username will be trimmed. 
+If ``false``, spaces will not be trimmed.
+
+- **Value Name:** ``DoNotTrimUsername``
+- **Value Type:** ``REG_SZ``
+- **Values:**
+
+  - Trim: ``false``
+  - Don't Trim: ``true``
+
+
+RDP Reconnection Count
+----------------------
+Specifies the number of attempts for RDP reconnections.
+
+- **Value Name:** ``RdpReconnectionCount``
+- **Value Type:** ``REG_DWORD``
+- **Values:**
+
+  - Minimum: ``0``
+  - Maximum: ``20``
+
+
+RDP Overall Connection Timeout
+------------------------------
+Specifies the overall connection timeout for RDP connections.
+
+- **Value Name:** ``ConRDPOverallConnectionTimeout``
+- **Value Type:** ``REG_DWORD``
+- **Values:**
+
+  - Minimum: ``20``
+  - Maximum: ``600``
+
+
+Auto Save Intervall
+-------------------
+Specifies the autosave interval in minutes. 
+
+- **Value Name:** ``AutoSaveEveryMinutes``
+- **Value Type:** ``REG_DWORD``
+- **Values:**
+
+  - Minimum: ``0``
+  - Maximum: ``9999``
+
+
+.. note::
+   To disable autosave, set *AutoSaveEveryMinutes* to ``0``.
+
+
+Registry Template
+=================
+
+.. code::
+  
+    Windows Registry Editor Version 5.00
+
+    [HKEY_LOCAL_MACHINE\SOFTWARE\mRemoteNG\Connections]
+
+    [HKEY_LOCAL_MACHINE\SOFTWARE\mRemoteNG\Connections\Options]
+    "SingleClickOnConnectionOpensIt"="true"
+    "SingleClickSwitchesToOpenConnection"="true"
+    "TrackActiveConnectionInConnectionTree"="false"
+    "SetHostnameLikeDisplayName"="true"
+    "UseFilterSearch"="false"
+    "PlaceSearchBarAboveConnectionTree"="false"
+    "DoNotTrimUsername"="true"
+    "AutoSaveEveryMinutes"=dword:00000010
+    "ConRDPOverallConnectionTimeout"=dword:0000012c
+    "RdpReconnectionCount"=dword:0000000a
+

mRemoteNGDocumentation/registry/sqlServer_settings.rst

@@ -0,0 +1,106 @@
+*******************
+SQL Server Settings
+*******************
+
+.. warning::
+    Before proceeding with any changes to the Windows Registry, it is imperative that you carefully read and comprehend the 
+    **Modifying the Registry**, **Restricted Registry Settings** and **Disclaimer** 
+    on :doc:`Registry Settings Infromation <registry_settings_information>`.
+
+
+Options
+=======
+Configure the options page to modify functionalities as described.
+
+- **Registry Hive:** ``HKEY_LOCAL_MACHINE``
+- **Registry Path:** ``SOFTWARE\mRemoteNG\SQLServer\Options``
+
+Use SQL Server
+--------------
+Specifies whether SQL Server is being used.
+
+- **Value Name:** ``UseSQLServer``
+- **Value Type:** ``REG_SZ``
+- **Values:**
+
+  - Enable: ``true``
+  - Disable: ``false``
+
+
+SQL Server Type 
+---------------
+Specifies the type of SQL Server being used.
+
+- **Value Name:** ``SQLServerType``
+- **Value Type:** ``REG_SZ``
+- **Values:**
+
+  - ``mssql``
+  - ``mysql``
+
+
+SQL Host
+--------
+Specifies the hostname/IP/FQDN of the SQL Server.
+
+- **Value Name:** ``SQLHost``
+- **Value Type:** ``REG_SZ``
+
+
+SQL Database Name
+-----------------
+Specifies the name/instance of the SQL database.
+
+- **Value Name:** ``SQLDatabaseName``
+- **Value Type:** ``REG_SZ``
+
+
+SQL User
+--------
+Specifies the username for accessing the SQL Server.
+
+- **Value Name:** ``SQLUser``
+- **Value Type:** ``REG_SZ``
+
+
+SQL User Password 
+-----------------
+Specifies the password for accessing the SQL Server.
+
+- **Value Name:** ``SQLPassword``
+- **Value Type:** ``REG_SZ``
+
+
+.. warning::
+  Plain-text passwords are not supported.
+
+
+SQL Read Only
+-------------
+Specifies whether the SQL connection is read-only.
+
+- **Value Name:** ``SQLReadOnly``
+- **Value Type:** ``REG_SZ``
+- **Values:**
+
+  - Enable: ``true``
+  - Disable: ``false``
+
+
+Registry Template
+=================
+
+.. code::
+
+    Windows Registry Editor Version 5.00
+
+    [HKEY_LOCAL_MACHINE\SOFTWARE\mRemoteNG\SQLServer]
+
+    [HKEY_LOCAL_MACHINE\SOFTWARE\mRemoteNG\SQLServer\Options]
+    "UseSQLServer"="false"
+    "SQLDatabaseName"=""
+    "SQLReadOnly"="true"
+    "SQLUser_"=""
+    "SQLServerType_"="MSSQL"
+    "SQLHost_"=""
+

mRemoteNGDocumentation/registry_settings_guide.rst

@@ -24,7 +24,9 @@ Make changes with caution and ensure that you have backups before making any adj
 
    registry/startupExit_settings.rst
    registry/appearance_settings.rst
+   registry/connection_settings.rst
    registry/tabsPanels_settings.rst
    registry/notification_settings.rst
    registry/credential_settings.rst
+   registry/sqlServer_settings.rst
    registry/updates_settings.rst