//outline.cpp

int GetOutline(LPDWORD image,int iWidth,int iHeight,DWORD BackColor,
			   POINT *lpPoints,int nPoints,int *nCount);

//outlineExPlus.cpp

int GetOutlineExPlus(LPDWORD image,int iWidth,int iHeight,int BackColor,
					 POINT *lpPoints,int nPoints,INT *lpPolyCounts,int nPolyCounts,int *nCount,
					 LPBYTE mask,BOOL inside);