Add the this code to your 'myCircle' function:
////////////////////////////////////////////////////////////
CClientDC dlgDC(this);//Device Context
CPen penRed(PS_SOLID, 2, RGB(255, 0, 0));//Define Pen&colour
dlgDC.SelectObject(&penRed);//Select the pen
CBrush brGreen(RGB(0, 255, 0));//Define...