The Microsoft Input/Output Stream Classes (iostream.hlp) (Table of Contents; Topic list)
streambuf::out_waiting
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──The Microsoft iostream Classes────────────────────────────────────────────
 
  int out_waiting() const;
 
  Remarks
 
  Returns the number of characters in the put area that have not been sent
  to the final output destination. These characters are between the pbase
  and pptr pointers.
 
 
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