Kinect v2 | XAML-Buttons | WinRT

Hi, I´ve created some Buttons in XAML and now I want to click these buttons with my Kinect-Cursor (mouseX & mouseY).
Have anyone an idea? Here some code:

Mouse-Control:
if (joint->Key == JointType::HandLeft)
{
CameraSpacePoint cameraPos = joint->Value.Position;
ColorSpacePoint colorPos = coordinateMapper->MapCameraPointToColorSpace(cameraPos);

lhx = colorPos.X;
lhy = colorPos.Y;
}

if (body->HandLeftConfidence == TrackingConfidence::High)
{
if (body->HandLeftState == HandState::Open)
{
ofNotifyMouseMoved(lhx * factor, lhy * factor);
}
else if (body->HandLeftState == HandState::Closed)
{
colorLeftHand = ofColor::red;
ofNotifyMouseMoved(lhx * factor, lhy * factor);
keyPressed(0); // OF_MOUSE_BUTTON_LEFT
}