Question

I have a code to display a part of screen when mouse moves. But the WH_MOUSE doesn’t work. I need to change GetModuleHandle(0), 0 to hInst, GetCurrentThreadId().

But then the application will work only when the mouse is over the application itself.

I want it global and I tried WH_MOUSE_LL, it is slower then WH_MOUSE.

Is that possible to use WH_MOUSE globally without DLL?

void SetHook()
{
    gMouseHook = SetWindowsHookEx(WH_MOUSE, MouseProc, GetModuleHandle(0), 0);
}   

//================================================================================
// Mouse Hook

static LRESULT CALLBACK MouseProc(int nCode, WPARAM wParam, LPARAM lParam)
{
    if (nCode < 0) {
    return CallNextHookEx(gMouseHook, nCode, wParam, lParam);
    }

    if (wParam == WM_MOUSEMOVE) {

    MOUSEHOOKSTRUCT *mouseInfo = (MOUSEHOOKSTRUCT*)lParam;

    int x = mouseInfo->pt.x;
    int y = mouseInfo->pt.y;

    PrintScreen(x, y);
    }

    return CallNextHookEx(gMouseHook, nCode, wParam, lParam);
}

Answer 1

Is that possible to use WH_MOUSE globally without DLL?

No, the hook procedure needs to be in a DLL so that it can be injected into other processes.

I tried WH_MOUSE_LL, it is slower then WH_MOUSE.

That probably means your hook procedure is slow.