The Microsoft Input/Output Stream Classes (iostream.hlp) (Table of Contents; Topic list)
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ofstream::rdbuf
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──The Microsoft iostream Classes────────────────────────────────────────────
 
  filebuf* rdbuf() const;
 
  Remarks
 
  Returns a pointer to the filebuf buffer object that is associated with
  this stream. (Note that this is not the character buffer; the filebuf
  object contains a pointer to the character area.)
 
  Example
 
      extern ofstream ofs;
      int fd = ofs.rdbuf()->fd(); // Get the file descriptor for ofs
 
 
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