System.Windows.Forms.XplatUIX11.SendParentNotify C# (CSharp) Method

		void SendParentNotify(IntPtr child, Msg cause, int x, int y)
		{	
			Hwnd hwnd;
			
			if (child == IntPtr.Zero) {
				return;
			}
			
			hwnd = Hwnd.GetObjectFromWindow (child);
			
			if (hwnd == null) {
				return;
			}
			
			if (hwnd.Handle == IntPtr.Zero) {
				return;
			}
			
			if (ExStyleSet ((int) hwnd.initial_ex_style, WindowExStyles.WS_EX_NOPARENTNOTIFY)) {
				return;
			}
			
			if (hwnd.Parent == null) {
				return;
			}
			
			if (hwnd.Parent.Handle == IntPtr.Zero) {
				return;
			}

			if (cause == Msg.WM_CREATE || cause == Msg.WM_DESTROY) {
				SendMessage(hwnd.Parent.Handle, Msg.WM_PARENTNOTIFY, Control.MakeParam((int)cause, 0), child);
			} else {
				SendMessage(hwnd.Parent.Handle, Msg.WM_PARENTNOTIFY, Control.MakeParam((int)cause, 0), Control.MakeParam(x, y));
			}
			
			SendParentNotify (hwnd.Parent.Handle, cause, x, y);
		}