怎样判断当前CTRL键被按下，我说的是当前。
我使用了GetAsyncKeyState(VK_CONTROL) < 0 和
#define IsCTRLpressed() ( (GetKeyState(VK_CONTROL) & (1 < < (sizeof(SHORT)*8-1))) != 0 )
进行判断，但是当我在需要判断之前按了一下CTRL后又松开，然后判断，发现以上函数表示的是CTRL已经被按下，但实际上我已经松开了，但如果再判断一次的话又会正常，为什么？

[解决办法]
PreTranslateMessage
[解决办法]
捕捉窗口的PreTranslateMessage
BOOL CMyWnd::PreTranslateMessage(MSG* pMsg)
{
// Catch the Alt key so we don 't choke if focus is going to an owner drawn button
if (pMsg-> message == WM_SYSCHAR)
return TRUE;
//int aa;
if(pMsg-> message == WM_KEYDOWN)
{
if (pMsg-> wParam == VK_CONTROL)
{

return TRUE;
}
}
}
[解决办法]
The GetAsyncKeyState function determines whether a key is up or down at the time the function is called, and whether the key was pressed after a previous call to GetAsyncKeyState.
因为Async。

使用GetKeyState或者GetKeyboardState