MyControl mc = new MyControl();
mc.TouchDown += mc_TouchDown;
mc.TouchUp += mc_TouchUp;

void mc_TouchDown(object sender, TouchEventArgs e)
    {
        var mc = (MyControl)sender;
        mc.CaptureTouch(e.TouchDevice);
    }

    void mc_TouchUp(object sender, TouchEventArgs e)
    {
        var mc = (MyControl)sender;
        if (mc != null && e.TouchDevice.Captured == mc)
        {
            //Expand and show button / Collapse and hide button
            mc.ReleaseTouchCapture(e.TouchDevice);
        }
    }