Sets the line cap style.
type
TLineCapStyle = ( lcButtEnd, lcRoundEnd, lcProjectSquareEnd );
Delphi 구문:
procedure SetLineCap ( Linecap: TLineCapStyle );
C++ 구문:
void __fastcall SetLineCap ( TLineCapStyle Linecap );
Description:
Graphics state의 line cap style을 설정합니다
Value Meaning
lcButtEnd Butt cap입니다. Stroke는 path endpoint에서 square off됩니다
There is no projection beyond the end of the path.
lcRoundEnd Round cap. A semicircular arc with a diameter equal to the line width
is drawn around the endpoint and filled in. 
lcProjectSquareEnd Projecting square cap입니다. Stroke는 path endpoint를 지나 계속됩니다
Line width의 절반에 해당하는 거리만큼 이어진 뒤 square off됩니다