{**
* 单元：FloatEdit
* 作者：网事如风
* 作用：可以设置对齐方式的Edit
* 使用：
**}

unit RightEdit;

interface

uses
  Windows, Messages, SysUtils, Classes, Controls, StdCtrls;

type
  TRightEdit = class(TEdit)
  private
    FAlignment   : TAlignment;      //对齐方式
    procedure SetAlignment(Value: TAlignment);
  protected
    procedure CreateParams(var Params: TCreateParams); override;
  public
    { Public declarations }
  published
    property Alignment: TAlignment read FAlignment write SetAlignment;
  end;

procedure Register;

implementation

procedure Register;
begin
    RegisterComponents('MyCompent', [TRightEdit]);
end;


procedure TRightEdit.CreateParams(var Params: TCreateParams);
begin
    inherited CreateParams(Params);
    Case FAlignment of
        taLeftJustify  : Params.Style := Params.Style + ES_LEFT;
        taRightJustify : Params.Style := Params.Style + ES_RIGHT;
        taCenter       : Params.Style := Params.Style + ES_CENTER;
    end;
end;

procedure TRightEdit.SetAlignment(Value: TAlignment);
begin
    if FAlignment <> Value then
    begin
        FAlignment := Value;
        RecreateWnd;
    end;
end;
end.

我已经把这几篇文章放到文档区了,呵呵