鼠标模拟有关问题

鼠标模拟问题
我想点击游戏里一个地方（200,300），我如下这样做时，鼠标在哪点击哪，而不是点击（200,300）点：
PostMessage (hwnd, WM_MOUSEMOVE, 0, MAKELONG (x, y));
PostMessage (hwnd, WM_LBUTTONDOWN, MK_LBUTTON, MAKELONG (x, y));
PostMessage (hwnd, WM_LBUTTONUP, 0, MAKELONG (x, y));
求解决办法！！！

[解决办法]

Delphi(Pascal) code

  Windows.SetCursorPos(200,300);  Mouse_Event(MOUSEEVENTF_LEFTDOWN,0,0,0,GetMessageExtraInfo());  Mouse_Event(MOUSEEVENTF_LEFTUP,  0,0,0,GetMessageExtraInfo());
[解决办法]
直接用mouseevent，别发消息，消息可能被截获