uses ShellAPI, ShlObj;
procedure TForm1.Button1Click(Sender: TObject);
var
 TitleName : string;
 lpItemID : PItemIDList;
 BrowseInfo : TBrowseInfo;
 DisplayName : array[0..MAX_PATH] of char;
 TempPath : array[0..MAX_PATH] of char;
begin
 FillChar(BrowseInfo, sizeof(TBrowseInfo), #0);
 BrowseInfo.hwndOwner := Form1.Handle;
 BrowseInfo.pszDisplayName := @DisplayName;
 TitleName := 'Please specify a directory';
 BrowseInfo.lpszTitle := PChar(TitleName);
 BrowseInfo.ulFlags := BIF_RETURNONLYFSDIRS;
 lpItemID := SHBrowseForFolder(BrowseInfo);
 if lpItemId nil then begin
  SHGetPathFromIDList(lpItemID, TempPath);
  ShowMessage(TempPath);
  GlobalFreePtr(lpItemID);
 end;
end;