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();

}