>I have a function that needs to delete each file it processes
>At present I am using
>! del &lfilename
> It opens a dos prompt for each file
>As this will process up to several hunderd files per day, I'd like to get rid of that and have the deletion invisable to the user.
>Any Ideas?

Use the native ERASE command, which will accept wildcards:

lFileName = 'foo*.txt'
ERASE (lFileName)