typedef struct tagOFNW {
   DWORD        lStructSize;
   HWND         hwndOwner;
   HINSTANCE    hInstance;
   LPCWSTR      lpstrFilter;
   LPWSTR       lpstrCustomFilter;
   DWORD        nMaxCustFilter;
   DWORD        nFilterIndex;
   LPWSTR       lpstrFile;
   DWORD        nMaxFile;
   LPWSTR       lpstrFileTitle;
   DWORD        nMaxFileTitle;
   LPCWSTR      lpstrInitialDir;
   LPCWSTR      lpstrTitle;
   DWORD        Flags;
   WORD         nFileOffset;
   WORD         nFileExtension;
   LPCWSTR      lpstrDefExt;
   LPARAM       lCustData;
   PVOID        lpfnHook;
   LPCWSTR      lpTemplateName;
   void*        pvReserved;
   DWORD        dwReserved;
   DWORD        FlagsEx;
} OPENFILENAMEW, *LPOPENFILENAMEW;