[RESOLVED] Why such code don't invoke Save dialog?

Code:

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      OPENFILENAME Ofn;      // common dialog box structure
      wchar_t szFile[260];    // buffer for file name
// Initialize OPENFILENAME
      ZeroMemory(&Ofn, sizeof(Ofn));         
      Ofn.lStructSize = sizeof(OPENFILENAME);
      Ofn.hwndOwner = hwnd;
      Ofn.lpstrFilter = L"All\0*.*";
      Ofn.lpstrFile = (LPWSTR) szFile;
      Ofn.nMaxFile = sizeof(szFile)/ sizeof(*szFile);
      Ofn.lpstrFileTitle = L"Save file";
      Ofn.nMaxFileTitle = 9;
      Ofn.lpstrInitialDir = (LPCWSTR)NULL;
      Ofn.Flags = OFN_SHOWHELP | OFN_OVERWRITEPROMPT;
      Ofn.lpstrTitle = szTitle;
          HANDLE hf;
          DWORD Written;
          if (GetSaveFileName(&Ofn)==TRUE)
          {}

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I had changed some parameters and all work...