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//声明:
PolylineTo(
  DC: HDC;       {设备环境句柄}
  var Points;    {点数组}
  Count: Integer {数组元素个数}
): BOOL;

//如果不给 PolylineTo 指定起点, 将默认 0 点位起点 procedure TForm1.FormPaint(Sender: TObject); var ps: array[0..5] of TPoint; begin ps[0].X := 50; ps[0].Y := 50; ps[1].X := 100; ps[1].Y := 50; ps[2].X := 125; ps[2].Y := 75; ps[3].X := 100; ps[3].Y := 100; ps[4].X := 50; ps[4].Y := 100; ps[5].X := 25; ps[5].Y := 75; PolylineTo(Canvas.Handle, ps, 6); end;
//效果图:

//给 PolylineTo 指定起点
procedure TForm1.FormPaint(Sender: TObject);
var
  ps: array[0..4] of TPoint;
begin
  MoveToEx(Canvas.Handle, 50,50, nil);
  
  ps[0].X := 100;
  ps[0].Y := 50;
  ps[1].X := 125;
  ps[1].Y := 75;
  ps[2].X := 100;
  ps[2].Y := 100;
  ps[3].X := 50;
  ps[3].Y := 100;
  ps[4].X := 25;
  ps[4].Y := 75;

  PolylineTo(Canvas.Handle, ps, 5);
end; 

//效果图:
//PolylineTo 更新当前位置
procedure TForm1.FormPaint(Sender: TObject);
var
  ps: array[0..4] of TPoint;
begin
  MoveToEx(Canvas.Handle, 50,50, nil);
  
  ps[0].X := 100;
  ps[0].Y := 50;
  ps[1].X := 125;
  ps[1].Y := 75;
  ps[2].X := 100;
  ps[2].Y := 100;
  ps[3].X := 50;
  ps[3].Y := 100;
  ps[4].X := 25;
  ps[4].Y := 75;

  PolylineTo(Canvas.Handle, ps, 5);

  {PolylineTo 更新当前位置, 继续画}
  LineTo(Canvas.Handle, 50,50);
end;

//效果图:

posted on 2008-02-09 20:23  万一  阅读(...)  评论(...编辑  收藏