DotNet 4.8.1 build of DotNetBar

PROMS/DotNetBar Source Code/TreeGX/Interop/WinApi.cs

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+using System.Windows.Forms;
+using System.Runtime.InteropServices;
+
+namespace DevComponents.Tree.Interop
+{
+	/// <summary>
+	/// Provides WinApi functions to rest of the application.
+	/// </summary>
+	internal class WinApi
+	{
+	
+		#region API Calls Declaration
+		
+		[DllImport("user32")]
+		private static extern bool TrackMouseEvent(ref TRACKMOUSEEVENT tme);
+		
+		[StructLayout(LayoutKind.Sequential)]
+		private struct TRACKMOUSEEVENT 
+		{
+			public int cbSize;
+			public uint dwFlags;
+			public int dwHoverTime;
+			public int hwndTrack;
+		}
+		
+		// Track Mouse Event Flags
+		private const uint
+			TME_HOVER=0x00000001,
+			TME_LEAVE=0x00000002,
+			TME_NONCLIENT=0x00000010,
+			TME_QUERY=0x40000000,
+			TME_CANCEL=0x80000000,
+			HOVER_DEFAULT=0xFFFFFFFF;
+
+		#endregion
+		
+		#region Functions
+		/// <summary>
+		/// Resets Hoover timer for specified control.
+		/// </summary>
+		public static void ResetHover(System.Windows.Forms.Control c)
+		{
+			if (c==null || !c.IsHandleCreated)
+				return;
+			
+			// We need to reset hover thing since it is fired only first time mouse hovers inside the window and we need it for each of our items
+			TRACKMOUSEEVENT tme = new TRACKMOUSEEVENT();
+			tme.dwFlags = TME_QUERY;
+			tme.hwndTrack = (int)c.Handle;
+			tme.cbSize = System.Runtime.InteropServices.Marshal.SizeOf(tme);
+			TrackMouseEvent(ref tme);
+			tme.dwFlags = tme.dwFlags | TME_HOVER;
+			TrackMouseEvent(ref tme);
+		}
+		#endregion
+	}
+}