CDC::Polygon
Draws a polygon consisting of two or more points (vertices) connected by lines, using the current pen.
BOOL Polygon(
LPPOINT lpPoints,
int nCount
);
Parameters
lpPoints
Points to an array of points that specifies the vertices of the polygon. Each point in the array is a POINT structure or a CPoint object.nCount
Specifies the number of vertices in the array.
Return Value
Nonzero if the function is successful; otherwise 0.
Remarks
The system closes the polygon automatically, if necessary, by drawing a line from the last vertex to the first.
The current polygon-filling mode can be retrieved or set by using the GetPolyFillMode and SetPolyFillMode member functions.
Example
void CDCView::DrawPolygon(CDC* pDC)
{
// find the client area
CRect rect;
GetClientRect(rect);
// draw with a thick blue pen
CPen penBlue(PS_SOLID, 5, RGB(0, 0, 255));
CPen* pOldPen = pDC->SelectObject(&penBlue);
// and a solid red brush
CBrush brushRed(RGB(255, 0, 0));
CBrush* pOldBrush = pDC->SelectObject(&brushRed);
// Find the midpoints of the top, right, left, and bottom
// of the client area. They will be the vertices of our polygon.
CPoint pts[4];
pts[0].x = rect.left + rect.Width()/2;
pts[0].y = rect.top;
pts[1].x = rect.right;
pts[1].y = rect.top + rect.Height()/2;
pts[2].x = pts[0].x;
pts[2].y = rect.bottom;
pts[3].x = rect.left;
pts[3].y = pts[1].y;
// Calling Polygon() on that array will draw three lines
// between the points, as well as an additional line to
// close the shape--from the last point to the first point
// we specified.
pDC->Polygon(pts, 4);
// Put back the old objects.
pDC->SelectObject(pOldPen);
pDC->SelectObject(pOldBrush);
}
Requirements
Header: afxwin.h