WinAPI: Pie - 绘制饼图

//声明:
Pie(
  DC: HDC;                                {设备环境句柄}
  X1, Y1, X2, Y2, X3, Y3, X4, Y4: Integer {四个坐标点}
): BOOL;


//举例:
procedure TForm1.FormPaint(Sender: TObject);
const
  x1 = 10;
  y1 = 10;
  x2 = 200;
  y2 = 200;
  x3 = 130;
  y3 = 200;
  x4 = 160;
  y4 = 10;
begin
  Canvas.TextOut(x1,y1, '第一点');
  Canvas.TextOut(x2,y2, '第二点');
  Canvas.TextOut(x3,y3, '第三点');
  Canvas.TextOut(x4,y4, '第四点');
  
  Pie(Canvas.Handle, x1,y1, x2,y2, x3,y3, x4,y4);
end;


//效果图:

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