WinAPI: Rectangle - 绘制矩形

//声明:

Rectangle(

  DC: HDC;                {设备环境句柄}

  X1, Y1, X2, Y2: Integer {两个点的坐标}

): BOOL;


 
   




//举例:

procedure TForm1.FormPaint(Sender: TObject);

const

  x1 = 20;

  y1 = 20;

  x2 = 200;

  y2 = 100;

begin

  Rectangle(Canvas.Handle, x1,y1, x2,y2);

end;


 
   




//效果图:

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