59 lines
1.4 KiB
C#
59 lines
1.4 KiB
C#
using System.Windows.Forms;
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using System.Runtime.InteropServices;
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using System;
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namespace DevComponents.AdvTree.Interop
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{
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/// <summary>
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/// Provides WinApi functions to rest of the application.
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/// </summary>
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internal class WinApi
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{
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#region API Calls Declaration
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[DllImport("user32")]
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private static extern bool TrackMouseEvent(ref TRACKMOUSEEVENT tme);
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[StructLayout(LayoutKind.Sequential)]
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private struct TRACKMOUSEEVENT
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{
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public int cbSize;
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public uint dwFlags;
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public int dwHoverTime;
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public IntPtr hwndTrack;
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}
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// Track Mouse Event Flags
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private const uint
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TME_HOVER=0x00000001,
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TME_LEAVE=0x00000002,
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TME_NONCLIENT=0x00000010,
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TME_QUERY=0x40000000,
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TME_CANCEL=0x80000000,
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HOVER_DEFAULT=0xFFFFFFFF;
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#endregion
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#region Functions
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/// <summary>
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/// Resets Hoover timer for specified control.
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/// </summary>
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public static void ResetHover(System.Windows.Forms.Control c)
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{
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if (c==null || !c.IsHandleCreated)
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return;
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// 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
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TRACKMOUSEEVENT tme = new TRACKMOUSEEVENT();
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tme.dwFlags = TME_QUERY;
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tme.hwndTrack = c.Handle;
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tme.cbSize = System.Runtime.InteropServices.Marshal.SizeOf(tme);
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TrackMouseEvent(ref tme);
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tme.dwFlags = tme.dwFlags | TME_HOVER;
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TrackMouseEvent(ref tme);
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}
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#endregion
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}
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}
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