应该是这样的:
Point msPoint = Control.MousePosition;
Control tmpControl = this.GetChildAtPoint(this.PointToClient(msPoint));
if (tmpControl != null)
{ 

}

谢谢,不过,它只能获取主容器,多级子容器就获取不了,还是我操作出错.

请多指教

那就用API了:
[StructLayout(LayoutKind.Sequential)]
private struct POINTSTRUCT
{
      public int x;
      public int y;
      public POINTSTRUCT(int x, int y);
}
 

[DllImport("user32.dll", EntryPoint="WindowFromPoint", CharSet=CharSet.Auto, ExactSpelling=true)]
private static extern IntPtr _WindowFromPoint(UnsafeNativeMethods.POINTSTRUCT pt);