Hi all!

Not sure if here or UDFs is the better place to post this, but - here goes.

After looking at the Kix manual, other people's UDFs, and the FAQ, I'm not really clear on the BEST way to code the value returned from a UDF.

Some examples I've considered:
INGROUP: 1 if found, 0 if not
EXIST: 1 if found, 0 if not
OPEN: 0 if success, other if error

Basically, what I've seen is that if a function "looks for something" (exist/not exist) it returns "1" on success, zero otherwise. However, if a function performs some other action, it appears to reverse the return values - "0" on success, non-zero for failure.

Is this a fair assumption?

How might you return an error code when the function normally returns an array? Is "EXIT 1" when an error occurs enough? Or should I end every function with an "EXIT 0" ? See below:

code:
 
Function test()
  Open(some_file)
  If @ERROR 
    Exit @ERROR
  EndIf
 
  :
 
  do stuff to the file & Close()
 
  :
 
  $test = $answer1,$answer2 ; return an array
 
  Exit 0   ; <= is this necessary, or recommended?
 
EndFunction
Finally, when a function can return Yes, No, or Fail, is "1", "0", and "-1" a reasonable representation of the Yes, No, and Fail values?

Thanks for the comments & feedback.. I kind of know what's right in my head, but - if I'm going to write a UDF that might be used by others, I'd like to make sure I follow the same path as everyone else (within reason [Big Grin] ).

Glenn
_________________________
Actually I am a Rocket Scientist! \:D