private void KeyPressed(byte key, int x, int y)
{
switch (key)
{
case (byte)27: // ESC
Thread.CurrentThread.Abort();
break;
case (byte)'c':
m_displayCalibrationGrid = !m_displayCalibrationGrid;
break;
case (byte)'f':
ToggleFullScreen();
break;
}
// force re-display
Glut.glutPostRedisplay();
//HWND z;
}