GDI+: GdipDrawPolygon

[José Roca]

The following example draws a polygon.

C++

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VOID Example_DrawPolygon2(HDC hdc)
{
   Graphics graphics(hdc);

   // Create a Pen object.
   Pen blackPen(Color(255, 0, 0, 0), 3);

   // Create an array of PointF objects that define the polygon.
   PointF point1(100.0f, 100.0f);
   PointF point2(200.0f, 130.0f);
   PointF point3(150.0f, 200.0f);
   PointF point4(50.0f, 200.0f);
   PointF point5(0.0f, 130.0f);
   PointF points[5] = {point1, point2, point3, point4, point5};
   PointF* pPoints = points;

   // Draw the polygon.
   graphics.DrawPolygon(&blackPen, pPoints, 5);
}


PowerBASIC

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SUB GDIP_DrawPolygon (BYVAL hdc AS DWORD)

   LOCAL hStatus AS LONG
   LOCAL pGraphics AS DWORD
   LOCAL pPen AS DWORD
   DIM   pt(4) AS POINTF

   hStatus = GdipCreateFromHDC(hdc, pGraphics)

   ' // Create a Pen
   hStatus = GdipCreatePen1(GDIP_ARGB(255,0, 0, 0), 3, %UnitPixel, pPen)

   ' // Create an array of PointF objects that define the polygon.
   pt(0).x = 100.0! : pt(0).y = 100.0!
   pt(1).x = 200.0! : pt(1).y = 130.0!
   pt(2).x = 150.0! : pt(3).y = 200.0!
   pt(3).x = 50.0!  : pt(3).y = 200.0!
   pt(4).x = 0.0!   : pt(4).y = 130.0!

   ' // Draw the pie
   hStatus = GdipDrawPolygon(pGraphics, pPen, pt(0), 5)

   ' // Cleanup
   IF pPen THEN GdipDeletePen(pPen)
   IF pGraphics THEN GdipDeleteGraphics(pGraphics)

END SUB