helpformunit.pas

三层的通用架构

unit HelpFormUnit;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ComCtrls, ExtCtrls;

type
  THelpForm = class(TForm)
    Image1: TImage;
    RichEdit1: TRichEdit;
    Label1: TLabel;
    Label2: TLabel;
    Bevel1: TBevel;
    Memo1: TMemo;
    Panel1: TPanel;
    Panel2: TPanel;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure FormShow(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  HelpForm: THelpForm;

implementation

{$R *.dfm}

procedure THelpForm.Button1Click(Sender: TObject);
begin
  Close;
end;

procedure THelpForm.FormCreate(Sender: TObject);
var
  HelpFileName, hString: string;
  HelpFile: TextFile;
begin
  HelpFileName := ExtractFilePath(Application.ExeName) + 'ReadMe.Txt';
  if FileExists(HelpFileName) then
  begin
    Memo1.Lines.Clear;
    AssignFile(HelpFile, HelpFileName);
    ReSet(HelpFile);
    try
      while not Eof(HelpFile) do
      begin
        ReadLn(HelpFile, hString);
        Memo1.Lines.Add(hString);
      end;
    finally
      CloseFile(HelpFile);
    end;
  end;
end;

procedure THelpForm.FormShow(Sender: TObject);
begin
  Button1.SetFocus;
end;

end.