Função personalizada para Selecionar Pasta

uses
  ... ShlObj, Forms, ActiveX;

function SelectDir(Owner: THandle; const Caption, InitialDir: string; const Root: 
WideString; ShowStatus: Boolean; out Directory: string): Boolean;

function BrowseCallbackProc(hwnd: HWND; uMsg: UINT; lParam, lpData: LPARAM): Integer; stdcall;
var
  Path: array[0..MAX_PATH] of Char;
begin
  case uMsg of
    BFFM_INITIALIZED:
    begin
      SendMessage(hwnd, BFFM_SETSELECTION, 1, lpData);
      SendMessage(hwnd, BFFM_SETSTATUSTEXT, 0, lpData);
    end;
    BFFM_SELCHANGED:
    begin
      if SHGetPathFromIDList(Pointer(lParam), Path) then
      begin
        SendMessage(hwnd, BFFM_SETSTATUSTEXT, 0, Integer(@Path));
      end;
    end;
  end;
  Result := 0;
end;

function SelectDir(Owner: THandle; const Caption, InitialDir: string; const Root: 
WideString; ShowStatus: Boolean; out Directory: string): Boolean;
var
  BrowseInfo: TBrowseInfo;
  Buffer: PChar;
  RootItemIDList,
  ItemIDList: PItemIDList;
  ShellMalloc: IMalloc;
  IDesktopFolder: IShellFolder;
  Eaten, Flags: LongWord;
  Windows: Pointer;
  Path: string;
begin
  Result := False;
  Directory := '';
  Path := InitialDir;
  if (Length(Path) > 0) and (Path[Length(Path)] = '\') then
  begin
    Delete(Path, Length(Path), 1);
  end;

  FillChar(BrowseInfo, SizeOf(BrowseInfo), 0);
  if (ShGetMalloc(ShellMalloc) = S_OK) and (ShellMalloc <> nil) then
  begin
    Buffer := ShellMalloc.Alloc(MAX_PATH);
    try
      SHGetDesktopFolder(IDesktopFolder);
      IDesktopFolder.ParseDisplayName(Owner, nil, PWideChar(Root), Eaten, RootItemIDList, Flags);
      with BrowseInfo do
      begin
        hwndOwner := Owner;
        pidlRoot := RootItemIDList;
        pszDisplayName := Buffer;
        lpszTitle := PChar(Caption);
        ulFlags := BIF_RETURNONLYFSDIRS;
        if ShowStatus then
        begin
          ulFlags := ulFlags or BIF_STATUSTEXT;
        end;
        lParam := Integer(PChar(Path));
        lpfn := BrowseCallbackProc;
        iImage := 0;
      end;

      Windows := DisableTaskWindows(Owner);
      try
        ItemIDList := ShBrowseForFolder(BrowseInfo);
      finally
        EnableTaskWindows(Windows);
      end;

      Result := ItemIDList <> nil;
      if Result then
      begin
        ShGetPathFromIDList(ItemIDList, Buffer);
        ShellMalloc.Free(ItemIDList);
        Directory := Buffer;
      end;
    finally
      ShellMalloc.Free(Buffer);
    end;
  end;
end;