CFileDialog crash in Platform SDK

[cilu]

I have installed Platform SDK Windows Server 2003 (I work in VS 6.0 on WinXP) and I have a problem with CFileDialog.

This code

void CFileTestView::OnViewFile() 
{
  CFileDialog dlg(TRUE);
  dlg.DoModal();
}

worked just fine before defining _WIN32_WINNT, which I need to use different functions and constants. Now, when I define it

#ifndef _WIN32_WINNT
#define _WIN32_WINNT  0x0501
#endif

my code just crashes in ~CFileDialog (when dlg does out of scope and is destroyed). Since m_ofn member of CFileDialog depends on this _WIN32_WINT:

typedef struct tagOFN { 
// ...
#if (_WIN32_WINNT >= 0x0500)
  void *        pvReserved;
  DWORD         dwReserved;
  DWORD         FlagsEx;
#endif // (_WIN32_WINNT >= 0x0500)
} OPENFILENAME

I rewrote the code this way:

void CFileTestView::OnViewFile() 
{
CFileDialog dlg(TRUE);

#if (_WIN32_WINNT >= 0x0500)
	dlg.m_ofn.pvReserved = NULL;
	dlg.m_ofn.dwReserved = 0;
	dlg.m_ofn.FlagsEx = 0;
#endif

dlg.DoModal();
}

but I still get a first-chance exception in FileTest.Exe (KERNEL32.dll) 0xC0000005: Access Violation (the usual stuff).

Any ideas? Thanks!