[darkmir]

Hola ecfisa,

el código que estoy utilizando es este:

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
    : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void ListFiles(String folder, TStrings *TS)
{
  WIN32_FIND_DATA wfd;
  HANDLE hFind;
  DWORD ERR;

  hFind = FindFirstFile(String(folder + "\\*.*").c_str(), &wfd);
  if (hFind != INVALID_HANDLE_VALUE) {
    do {
      if (String(wfd.cFileName) != "." && String(wfd.cFileName) != "..") {
        if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
          ListFiles(String(folder+"\\"+wfd.cFileName), TS);
        else
          TS->Add(String(folder+"\\"+wfd.cFileName));
      }
    } while(FindNextFile(hFind, &wfd));
    FindClose(&wfd);
  }
}
void __fastcall TForm1::Button1Click(TObject *Sender)
{
  ListFiles("E:\\", ListBox1->Items);
}

porseacaso te mando estos datos:
- version trial del Embarcadero c++ XE5.
- windows 7 64 bits.

quizás sea la version en la que se compila y ejecuta.

Saludos.