Re: Timerproc exception

Thanks. I realise I'm going to have to read up a lot on exceptions if I want
to know what's really going on. For the record, here's the essence of what
happened:
(using VC++ 6 with default setting for /EH)

void CALLBACK timerproc(..)
{
 try {
   ...
   FILE *fp;
   ...
   fgets (..., fp); // sometimes fp is NULL!
  ...
 }
 catch (CException *e) {..}
 catch (std::exception &e) {..}
 ..
} // end of timerproc
A program log tells me that 'fgets' is entered, but does not return by the
usual route, nor is an exception caught; but the timer proc is re-entered
normally when the timer next fires.
At least my bug ultimately has a trivial solution, making sure fp != NULL,
but it was hellish to find!