We have a program that simply opens the file. If it's not valid it takes
the ELSE clause.

Hth
Colin Alfke
Calgary, Canada 

>-----Original Message-----
>From: Adam Eccleshall
>
>Hi,
>
>Is it possible from inside a UniBasic program to identify 
>whether or not a VOC pointer points to a valid UniData file?  
>Currently, I have a routine which OSOPENs and reads from the 
>file and compares certain bytes at the beginning of the file 
>which appeared consistent in my initial checks, however some 
>valid files don't match this pattern.  Are there any more 
>accurate ways of doing this check?
>
>I tried checking FILEINFO(fp,3), however after an OSOPEN, this 
>returns 5 (sequential file) either way.
>
>
>
>Thanks in advance,
>
>Adam 
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