Capturing files in a directory

[drwbns]

dir is a StringVector like you suggested - but I'm getting a crash after calling buttonPush -

bool buttonPush(HWND hWnd, StringVector &dir ) {

		BROWSEINFO bi;
   TCHAR szDir[MAX_PATH];
   LPITEMIDLIST pidl;
   LPMALLOC pMalloc;

   if (SUCCEEDED(SHGetMalloc(&pMalloc)))
   {
      ZeroMemory(&bi,sizeof(bi));
      bi.hwndOwner = hWnd;
      bi.pszDisplayName = 0;
      bi.pidlRoot = 0;
      bi.ulFlags = BIF_RETURNONLYFSDIRS | BIF_STATUSTEXT | BIF_USENEWUI | BIF_NONEWFOLDERBUTTON;
	  bi.pszDisplayName = szDir; // Address of a buffer to receive the display name of the folder selected by the user
		bi.lpszTitle = _T("Select a folder"); // Title of the dialog

      bi.lpfn = BrowseCallbackProc;
	pidl = SHBrowseForFolder(&bi); 
		
		if (pidl) 
		{ 
			BOOL bRet = ::SHGetPathFromIDList(pidl, const_cast<char *>(dir[0].c_str())); // dir gets a bad ptr here, how can I do this with a StringVector?
			pMalloc->Free(pidl); 
			pMalloc->Release();
			if(bRet) return true;
		} 
    }
   return false;
}

SetWindowText(textBox2, const_cast<char *>(dir[0].c_str()));

Is const casting safe to do in this scenario?