Function HandleWindowMessage

PresentMon/MainThread.cpp:171–213

Handle window messages to toggle recording on/off

// Handle window messages to toggle recording on/off
static LRESULT CALLBACK HandleWindowMessage(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    auto const& args = GetCommandLineArgs();

    switch (uMsg) {
    case WM_TIMER:
        switch (wParam) {
        case DELAY_TIMER_ID:
            StartRecording();
            KillTimer(hWnd, DELAY_TIMER_ID);
            return 0;

        case TIMED_TIMER_ID:
            StopRecording();
            if (args.mTerminateAfterTimer) {
                ExitMainThread();
            }
            return 0;

        case ETW_STATUS_TIMER_ID:
            OutputEtwStatus();
            return 0;
        }
        break;

    case WM_HOTKEY:
        if (gHotkeyIgnoreCount > 0) {
            gHotkeyIgnoreCount -= 1;
            break;
        }

        if (IsRecording()) {
            StopRecording();
        } else if (args.mDelay == 0) {
            StartRecording();
        } else {
            SetTimer(hWnd, DELAY_TIMER_ID, args.mDelay * 1000, (TIMERPROC) nullptr);
        }
        return 0;
    }

    return DefWindowProc(hWnd, uMsg, wParam, lParam);
}

void ExitMainThread()
{