游戏屏蔽了按键消息怎么办？(50分)

打游戏中，写了段代码自动拣东西，可是游戏中好象屏蔽了按键消息，该怎么弄？

keybd_event(VK_SPACE, 0, 0, 0);
keybd_event(VK_SPACE, 0, KEYEVENTF_KEYUP, 0);

PostMessage(GameWindow,WM_KEYDOWN,VK_SPACE,1);
PostMessage(GameWindow,WM_KEYUP,VK_SPACE,1);

SendMessage(GameWindow,WM_KEYDOWN,VK_SPACE,1);
SendMessage(GameWindow,WM_KEYUP,VK_SPACE,1);

这些都不行。