C#-窗体鼠标穿透

#region 窗体鼠标穿透
private const uint WS_EX_LAYERED = 0x80000;
private const int WS_EX_TRANSPARENT = 0x20;
private const int GWL_STYLE = (-16);
private const int GWL_EXSTYLE = (-20);
private const int LWA_ALPHA = 0; [DllImport("user32", EntryPoint = "SetWindowLong")]
private static extern uint SetWindowLong(
IntPtr hwnd,
int nIndex,
uint dwNewLong
); [DllImport("user32", EntryPoint = "GetWindowLong")]
private static extern uint GetWindowLong(
IntPtr hwnd,
int nIndex
); [DllImport("user32", EntryPoint = "SetLayeredWindowAttributes")]
private static extern int SetLayeredWindowAttributes(
IntPtr hwnd,
int crKey,
int bAlpha,
int dwFlags
); /// <summary>
/// 声明委托类
/// </summary>
/// <param name="MsgStr"></param>
public delegate void FormCt();
/// <summary>
/// 定义委托
/// </summary>
public static FormCt Ct;
/// <summary>
/// 设置窗体具有鼠标穿透效果
/// </summary>
private void SetPenetrate()
{
if (this.InvokeRequired)
{
this.Invoke(Ct);
}
else
{
this.TopMost = true;
GetWindowLong(this.Handle, GWL_EXSTYLE);
SetWindowLong(this.Handle, GWL_EXSTYLE, WS_EX_TRANSPARENT | WS_EX_LAYERED);
SetLayeredWindowAttributes(this.Handle, 0, 100, LWA_ALPHA);
}
}
#endregion