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LOGPEN pen ;
pen.lopnColor = RGB( 255, 0, 0) ;
pen.lopnWidth.x = 1 ;
pen.lopnWidth.y = 1 ;
pen.lopnStyle = PS_SOLID ;
HPEN hPen = CreatePenIndirect( &pen) ;
HPEN hPenOld = (HPEN)SelectObject(CDCompatible, hPen);
MoveToEx(CDCompatible, startPos.x, startPos.y, NULL);
LineTo(CDCompatible, endPos.x, endPos.y);