/// <summary>
/// 根据Windows消息内容计算鼠标光标在屏幕中的位置
/// </summary>
/// <param name="intMessage">Windows消息编号</param>
/// <param name="Hwnd">Windows消息中的窗体句柄</param>
/// <param name="lParam">Windows消息的Param参数</param>
/// <returns>鼠标光标在屏幕中的位置</returns>
public static System.Drawing.Point GetMousePositionFromMessage(int intMessage, IntPtr Hwnd, uint lParam)
{
bool bolClient = true;
if (// 鼠标在非客户区的按键按下消息
(intMessage == (int)Msgs.WM_NCLBUTTONDOWN) ||
(intMessage == (int)Msgs.WM_NCMBUTTONDOWN) ||
(intMessage == (int)Msgs.WM_NCRBUTTONDOWN) ||
(intMessage == (int)Msgs.WM_NCXBUTTONDOWN) ||
// 鼠标在非客户区的按键松开消息
(intMessage == (int)Msgs.WM_NCLBUTTONUP) ||
(intMessage == (int)Msgs.WM_NCMBUTTONUP) ||
(intMessage == (int)Msgs.WM_NCRBUTTONUP) ||
(intMessage == (int)Msgs.WM_NCXBUTTONUP) ||
// 鼠标在非客户区的移动消息
(intMessage == (int)Msgs.WM_NCMOUSEMOVE))
{
bolClient = false;
}
NativePOINT pt = new NativePOINT();
pt.x = (short)(lParam & 0x0000FFFFU);
pt.y = (short)((lParam & 0xFFFF0000U) >> 16);
if (bolClient)
{
ClientToScreen(Hwnd, ref pt);
}
return(new System.Drawing.Point(pt.x, pt.y));
}
public static System.Drawing.Point GetMousePositionFromMSG(NativeMSG msg)
{
NativePOINT pt = new NativePOINT();
pt.x = (short)((uint)msg.lParam & 0x0000FFFFU);
pt.y = (short)(((uint)msg.lParam & 0xFFFF0000U) >> 16);
ClientToScreen(new IntPtr(msg.hwnd), ref pt);
return(new System.Drawing.Point(pt.x, pt.y));
}
public static System.Drawing.Point GetMousePositionFromMSG(IntPtr hwnd, uint lParam)
{
NativePOINT pt = new NativePOINT();
pt.x = (short)(lParam & 0x0000FFFFU);
pt.y = (short)((lParam & 0xFFFF0000U) >> 16);
ClientToScreen(hwnd, ref pt);
return(new System.Drawing.Point(pt.x, pt.y));
}
public static extern int WindowFromPoint(NativePOINT Point);
public static extern bool ScreenToClient(IntPtr hWnd, ref NativePOINT pt);
public static extern bool ClientToScreen(IntPtr hWnd, ref NativePOINT pt);
public static extern bool UpdateLayeredWindow(IntPtr hwnd, int hdcDst, ref NativePOINT pptDst, ref SIZE psize, int hdcSrc, ref NativePOINT pprSrc, Int32 crKey, ref BLENDFUNCTION pblend, Int32 dwFlags);
