Checking for Active Status

static LRESULT 
OnIdle(HWND hwnd) 
{ 
    HRESULT hRes; 
 
    // Only animate if we are the foreground app, we aren't suspended, 
    // and we have completed initialization. 
 
    if (fActive && !fSuspended && (NULL != lpd3dDevice)) 
    { 
        hRes = AnimateScene(); 
        if (FAILED(hRes)) 
        { 
            FatalError(hwnd, IDS_ERRMSG_ANIMATESCENE, hRes); 
            return 0L; 
        } 
 
        hRes = DoFrame(); 
        if (FAILED(hRes)) 
        { 
            FatalError(hwnd, IDS_ERRMSG_RENDERSCENE, hRes); 
            return 0L; 
        } 
    } 
 
    return 0L; 
}