void HelloMultitouchApp::setup()
{
    // create font
    font = Font("Arial", 22);
    texture_font = gl::TextureFont::create(font);

    active_points = std::map<int, gwc::Point>();

    if (!GestureWorks::Instance()->LoadGestureWorks(L"GestureworksCore32.dll")) {
        console() << "Error loading gestureworks dll" << std::endl;
    }

    GestureWorks::Instance()->InitializeGestureWorks(0, 0);

    if (!GestureWorks::Instance()->LoadGML(L"basic_manipulation.gml")) {
        console() << "Could not find gml file" << std::endl;
    }

    if (!GestureWorks::Instance()->RegisterWindowForTouchByName(L"Hello Multitouch!")) {
        console() << "Could not register target window for touch." << std::endl;
    }

    use_pixels = true;
    GestureWorks::Instance()->SetUsePixels(use_pixels);
}