HPEN Pen,OldPen;
HBRUSH MyBrush,OldBrush;

hdc=BeginPaint(hWnd, &ps);
MyBrush=CreateSolidBrush(RGB(255,255,0)); // 색깔 지정
OldBrush=(HBRUSH)SelectObject(hdc,MyBrush);
Pen = CreatePen(PS_DASH, /* 굵기 */, RGB(0,0,0));
OldPen=(HPEN)SelectObject(hdc, Pen);
// 여기다 도형을 그리세요
SelectObject(hdc,OldBrush);
DeleteObject(MyBrush);
SelectObject(hdc, OldPen);
DeleteObject(Pen);
EndPaint(hWnd, &ps);

그럼 즐프하세요 ~ /ㅂ/