nSetForeColor(R,G,B);
nSetForeColor(255,0,0); // red
nSetForeColor(0,255,0); // green
nSetForeColor(0,0,255); // blue
n PaintRect(left,top,right,bottom);
nPaintRect(10,10,100,100)
nPaintCircle(xcenter,ycenter,radius);
nPaintCircle(200,200,10)
nPaintOval(left,top,right,bottom);
nInvertOval(left,top,right,bottom);
n