What does "..." in a function declartion mean?

[sofakng]

Here is what I'm trying to do:

int ds_fscanf(FILE *f , const char *format, ...)
{
  return KOS_fscanf( (KOS_FILE*) f, format, ...);
}

The error I'm getting is on the return line...

error: syntax error before '...' token

If I comment out the return line then it compiles fine, so the "..." in the function declartion work fine, but it seems like I am unable to pass the "..." to ANOTHER function. How can I do this? What do the three dots even mean?

Thanks!

[Dave_Sinkula]

http://c-faq.com/varargs/vscanf.html
http://c-faq.com/varargs/handoff.html