没法调用shlobj里的函数

pleasenter

uses
  shlobj;
///////////////////////////////////////////////////////////////////
// Call back function used to set the initial browse directory.
///////////////////////////////////////////////////////////////////
var
  lg_StartFolder: string;

function BrowseForFolderCallBack(Wnd: HWND; uMsg: UINT;
  lParam, lpData: LPARAM): Integer stdcall;
begin
  if uMsg = BFFM_INITIALIZED then
    SendMessage(Wnd, BFFM_SETSELECTION, 1, Integer(@lg_StartFolder[1]));
  result := 0;
end;

///////////////////////////////////////////////////////////////////
// This function allows the user to browse for a folder
//(* 转载敬请注明－本文出处：南山古桃(nsgtao)的百度空间：http://hi.baidu.com/nsgtao/ *)
// Arguments:-
// browseTitle : The title to display on the browse dialog.
// initialFolder : Optional argument. Use to specify the folder
// initially selected when the dialog opens.
//
// Returns: The empty string if no folder was selected ( i.e. if the
// user clicked cancel), otherwise the full folder path.
///////////////////////////////////////////////////////////////////

function BrowseForFolder(ModalHandle: HWND; const browseTitle: string;
  const initialFolder: string = ''): string;
const
  BIF_NEWDIALOGSTYLE = $40;
var
  browse_info: TBrowseInfo;
  folder: array[0..MAX_PATH] of char;
  find_context: PItemIDList;
begin
  FillChar(browse_info, SizeOf(browse_info), #0);
  lg_StartFolder := initialFolder;
  browse_info.hwndOwner := ModalHandle;
  browse_info.pszDisplayName := @folder[0];
  browse_info.lpszTitle := PChar(browseTitle);
  browse_info.ulFlags := BIF_RETURNONLYFSDIRS or BIF_NEWDIALOGSTYLE;
  if initialFolder <> '' then
    browse_info.lpfn := BrowseForFolderCallBack;
  find_context := SHBrowseForFolder(browse_info);
  if Assigned(find_context) then
  begin
    if SHGetPathFromIDList(find_context, folder) then
      result := folder
    else
      result := '';
    GlobalFreePtr(find_context);
  end
  else
    result := '';
end;

procedure TfrmMain.btnAddPathClick(Sender: TObject);
var
  Path: string;
begin
  Path := BrowseForFolder(Handle, '', ''); //启动Windows目录对话框，一句话就解决了。
  if Path <> '' then //如果返回地址为空，则报错
  begin
    ShowMessage(Path); //保存当次的最后路径；
  end;
end;

上面这个函数是打开浏览目录对话框的，在delphi7里只要引用shlobj就行了，可是移植到lazarus时，
TBrowseInfo等结构定义在Lazarus中的shlobj中没有，只在struct.inc里定义了，那么我该怎么引用这些结构呢？