代码:屏蔽三个全局快捷键

代码的作用是屏蔽掉凝视中的三个快捷键.

LRESULT CALLBACK LowLevelKeyboardProc (INT nCode, WPARAM wParam, LPARAM lParam){	// By returning a non-zero value from the hook procedure, the	// message does not get passed to the target window	KBDLLHOOKSTRUCT *pkbhs = (KBDLLHOOKSTRUCT *)lParam;	BOOL bControlKeyDown = 0;	HWND hWnd = GetForegroundWindow();	WCHAR szClassName[MAX_PATH] = {0};	::GetClassName(hWnd, szClassName, MAX_PATH);		switch (nCode)		{		case HC_ACTION:			{				// Check to see if the CTRL key is pressed				bControlKeyDown = GetAsyncKeyState (VK_CONTROL) >> ((sizeof(SHORT) * 8) - 1);				 //Disable CTRL+ESC				if (pkbhs->vkCode == VK_ESCAPE && bControlKeyDown)					return 1;				 //Disable ALT+TAB				if (pkbhs->vkCode == VK_TAB && pkbhs->flags & LLKHF_ALTDOWN)					return 1;				 //Disable ALT+ESC				if (pkbhs->vkCode == VK_ESCAPE && pkbhs->flags & LLKHF_ALTDOWN)					return 1;				break;			}		default:			break;		}		//MessageBoxA(NULL, "aaa", NULL, MB_OK);		return 1;}void ChookKeyboardllDlg::OnBnClickedOk(){	// TODO: 在此加入控件通知处理程序代码	Hook=(HHOOK)SetWindowsHookEx(WH_KEYBOARD_LL,(HOOKPROC)LowLevelKeyboardProc, theApp.m_hInstance,0); 	//CDialogEx::OnOK();}void ChookKeyboardllDlg::OnBnClickedCancel(){	// TODO: 在此加入控件通知处理程序代码	if(Hook)	{		BOOL result = UnhookWindowsHookEx((HHOOK)Hook); // 卸载钩子		if (result) Hook = NULL;	}	//CDialogEx::OnCancel();}