[Страдалецъ]

Люблю такие элегантные красивые задачки.
Держите:

Код:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Notebook: TPageControl;
    procedure FormCreate(Sender: TObject);
    procedure FileListClick(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
Var
  Page: TTabSheet;
  Memo: TMemo;
  FileList: TListBox;
  i,j: Integer;
  FileInfo: TSearchRec;
  FilePath,FileMask: String;
  Files: TStringList;
begin
 FilePath := ParamStr(1);
 FileMask := ParamStr(2);
 if FilePath = '' then FilePath := ExtractFilePath(ParamStr(0));
 if FileMask = '' then FileMask := '*.txt';

 Files := TStringList.Create;
 Files.Sorted := True;
 if FindFirst(FilePath + FileMask, faAnyFile, FileInfo) = 0
 then repeat
      if FileInfo.Attr and faAnyFile <> 0
      then Files.Add(AnsiUpperCase(FileInfo.Name))
      until FindNext(FileInfo) <> 0;

 for i := 65 to 90
 do begin
    Page := TTabSheet.Create(Notebook);
    Page.PageControl := Notebook;
    Page.Caption := Chr(i);
    FileList := TListBox.Create(Page);
    FileList.Parent := Page;
    FileList.Align := alLeft;
    FileList.Width := 200;
    FileList.OnClick := FileListClick;

    Memo := TMemo.Create(Page);
    Memo.Parent := Page;
    Memo.Align := alClient;
    for j := 0 to Files.Count - 1
    do if Files.Strings[j][1] = AnsiUpperCase(Chr(i))
       then FileList.AddItem(Files.Strings[j],nil);
    end;
 Files.Free;
end;

procedure TForm1.FileListClick(Sender: TObject);
Var
 M: TMemo;
 LB: TListBox;
begin
 LB := TListBox(Notebook.ActivePage.Controls[0]);
 M := TMemo(Notebook.ActivePage.Controls[1]);
 M.Clear;
 M.Lines.LoadFromFile(LB.Items[LB.ItemIndex]);
end;

end.

и dfm-файл

Код:

object Form1: TForm1
  Left = 351
  Top = 116
  Width = 870
  Height = 640
  Caption = 'Form1'
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  OnCreate = FormCreate
  PixelsPerInch = 96
  TextHeight = 13
  object Notebook: TPageControl
    Left = 8
    Top = 8
    Width = 849
    Height = 585
    TabOrder = 0
    TabPosition = tpBottom
    TabWidth = 30
  end
end