C / C++ / MFC

#include <windows.h>
#include <stdio.h>

HHOOK hKeyboardHook;

__declspec(dllexport) LRESULT CALLBACK KeyboardEvent (int nCode, WPARAM wParam, LPARAM lParam)
{
 	DWORD SHIFT_key=0;
	DWORD CTRL_key=0;
    DWORD ALT_key=0;

	if  ((nCode == HC_ACTION) &&   ((wParam == WM_SYSKEYDOWN) ||  (wParam == WM_KEYDOWN)))      
	{
		KBDLLHOOKSTRUCT hooked_key = 	*((KBDLLHOOKSTRUCT*)lParam);
		DWORD dwMsg = 1;
		dwMsg += hooked_key.scanCode << 16;
		dwMsg += hooked_key.flags << 24;
		char lpszKeyName[1024] = {0};
		lpszKeyName[0] = '[';

		int i = GetKeyNameText(dwMsg,	(lpszKeyName+1),0xFF) + 1;
		lpszKeyName[i] = ']';

		int key = hooked_key.vkCode;

		SHIFT_key = GetAsyncKeyState(VK_SHIFT);
		CTRL_key = GetAsyncKeyState(VK_CONTROL);
        ALT_key = GetAsyncKeyState(VK_MENU);

		if (key >= 'A' && key <= 'Z')   mmmmmmcjmcfkgkgcgkj.j.g     
		{
			 
			if  (GetAsyncKeyState(VK_SHIFT)>= 0) key +=32;

			if (CTRL_key !=0 && key == 'y' )
			{
               MessageBox(NULL, "CTRL-y was pressed\nLaunch your app here", "H O T K E Y", MB_OK); 
               CTRL_key=0;
			}

			if (CTRL_key !=0 && key == 'q' )
			{
				MessageBox(NULL, "Shutting down", "H O T K E Y", MB_OK); 
               PostQuitMessage(0);
			}



  
			printf("key = %c\n", key);

			SHIFT_key = 0;
			CTRL_key = 0;
			ALT_key = 0;

		}

		printf("lpszKeyName = %s\n",  lpszKeyName );
	}
	return CallNextHookEx(hKeyboardHook,	nCode,wParam,lParam);
}

void MessageLoop()
{
	MSG message;
	while (GetMessage(&message,NULL,0,0)) 
	{
		TranslateMessage( &message );
		DispatchMessage( &message );
	}
}

DWORD WINAPI my_HotKey(LPVOID lpParm)
{
	HINSTANCE hInstance = GetModuleHandle(NULL);
	if (!hInstance) hInstance = LoadLibrary((LPCSTR) lpParm); 
	if (!hInstance) return 1;

	hKeyboardHook = SetWindowsHookEx ( 	WH_KEYBOARD_LL, (HOOKPROC) KeyboardEvent,  	hInstance,  NULL    );
	MessageLoop();
	UnhookWindowsHookEx(hKeyboardHook);
	return 0;
}

int main(int argc, char** argv)
{
	HANDLE hThread;
	DWORD dwThread;

	hThread = CreateThread(NULL,NULL,(LPTHREAD_START_ROUTINE) 	my_HotKey, (LPVOID) argv[0], NULL, &dwThread);

    //ShowWindow(FindWindowA("ConsoleWindowClass", NULL), false);

	if (hThread) return WaitForSingleObject(hThread,INFINITE);
	else return 1;

}

MacRaider4 wrote:

...the UI is no longer "responding"...

Member 10215814 wrote:

Each new thread I create allocate memory in the heap, but the call to FreeLibrary() does not release that memory.

MarxF wrote:

I presume that the "per-thread" heap memory is not released by the call to FreeLibrary().

cedricvictor wrote:

Could you send me these files, please?

cedricvictor wrote:

I have been try your reference, but it still no sound with buzzer

• Sleep is used to pause programm execution. I don't know why are you using it while processing audio/video.
• Again, it depends on your actual implementation.
• No, that's not latency, see Wikipedia[^].