getting the 'name of the application' along with the key taps - c++

Question

To record the key taps I install the hook as :
BOOL WINAPI installHook(HINSTANCE hinstDLL, DWORD fwdReason, LPVOID lpvReserved) {
handleKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, LowLevelKeyboardProc, hinstDLL, 0);
MSG msg;
while(GetMessage(&msg, NULL, 0, 0)){
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
static LRESULT CALLBACK LowLevelKeyboardProc(int nCode, WPARAM wParam, LPARAM lParam) {
// write here
}
Is there any way I can know the application name where the keys are currently being tapped ? Like I have opened notepad an writing something , can I get the name of the application which is notepad along with the key taps ? Same goes for some other application like mozilla firefox.

Answer 1

The inside of your hook should look like so:
static LRESULT CALLBACK LowLevelKeyboardProc(int nCode, WPARAM wParam, LPARAM lParam)
{
// if it is not a keydown event, continue the chain
if(HC_ACTION != nCode || WM_KEYDOWN != wParam)
return CallNextHookEx(0, nCode, wParam, lParam);
const KBDLLHOOKSTRUCT* messageInfo = reinterpret_cast<const KBDLLHOOKSTRUCT*>(lParam);
// add more code here...
// tell Windows we processed the hook
return 1;
}
messageinfo.vkCode will contain the key codes your looking for. The official list of these codes is at: http://msdn.microsoft.com/en-us/library/windows/desktop/dd375731%28v=vs.85%29.aspx
Keys usually get typed into the foreground window (although sometimes strange window layouts happens). You can get the title of the foreground window like this:
TCHAR title[100]; // increase size for longer titles
GetWindowText(GetForegroundWindow(), title, 100);
If you want to get the name of the program instead, use:
TCHAR title[100]; // increase size for longer program names
GetWindowModuleFileName(GetForegroundWindow(), title, 100);
And, remember to add error checking and check the documentation.