随心所欲地在memo或richedit里作图1

通过该方法你可以随心所欲地在memo或richedit里作图了！呵呵！
function Tform1.memopain:boolean;
var
  MyCanvas: TControlCanvas;
Begin
  MyCanvas:=TControlCanvas.Create;
  Mycanvas.control:=memo1;//想在memo1上作画
  With Mycanvas do
  Begin
//这里可以更改为你的作图程序
    Brush.Color := clBtnFace;
    MoveTo ( 33, 0 );
    Brush.Color := clWhite;
    LineTo ( 33, ClientHeight );
  end;
End;