unit UGamedlg;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Buttons, FileCtrl;

type
  TForm1 = class(TForm)
    DirectoryListBox: TDirectoryListBox;
    DriveComboBox: TDriveComboBox;
    FileListBox: TFileListBox;
    FilterComboBox: TFilterComboBox;
    Label1: TLabel;
    lblFiletypes: TLabel;
    lblDescription: TLabel;
    mDescription: TMemo;
    btnOk: TBitBtn;
    btnCancel: TBitBtn;
    btnHelp: TBitBtn;
    lblFilename: TLabel;
    procedure FileListBoxKeyPress(Sender: TObject; var Key: Char);
    procedure btnOkClick(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.btnOkClick(Sender: TObject);
var
  Filename: String;
  Filepart: String;
  Fileextn: String;
  ExtSepPos: Integer;
begin
  Fileextn := '.txt';
  Filename := FileListBox.FileName;
  FilePart := Filename;
  ExtSepPos := POS('.',FileName);
  if ExtSepPos>0 then System.Delete(Filepart,ExtSepPos,3);

  {if Key = #13 then}
    if ExtractFileExt(FileName) = '.rtf' then
    begin

      mDescription.Clear;
      Filename := ChangeFileExt(Filename,'.txt');
      mDescription.Lines.LoadFromFile(Filename);

    end;
end;

procedure TForm1.FileListBoxKeyPress(Sender: TObject; var Key: Char);
begin
  BtnOkClick(Sender); //funktioniert leider nicht wie gewünscht
end;

end.