SetPixel() 을 사용하여 원을 그리기...
void MyEllipse(CDC *parm_dc, int parm_x, int parm_y, int parm_r, COLORREF parm_color)
{
for(int i = 0; i < 360; i++){
parm_dc->SetPixel(parm_x + int(sin(i*3.141592/180)*parm_r),
parm_y + int(cos(i*3.141592/180)*parm_r), parm_color);
}
} 