软键盘制作

Question

我用keybd_event函数做的，但这个函数具体用法不会，请高人指点下！
特别是第一个参数的用法

Answer 1

keybd_event(VK_CONTROL,0,0,0); //按下Ctrl
keybd_event(VK_CONTROL,0,KEYEVENTF_KEYUP,0);//松开Ctrl自己参看：
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputfunctions/keybd_event.asp