HWND GetFocusWindow()
{
    HWND hWin;
    HWND hWndReturn;
    int TID, PID, MyID;

    MyID = GetCurrentThreadID();
    hWin = GetForegroundWindow();
    TID = GetWindowThreadProcessID( hWin, &PID );
    if( AttachThreadInput( TID, MyID, TRUE ) ) {
        SetForgroundWindow( hWin );
        hWndReturn = GetFocus();
        AttachThreadInput( TID, MyID, FALSE );
    } else {
        hWndReturn = NULL;
    }
}