>I want to get the data from the table and call that function. I would like to put in a validation to check that the specified function exists before I call it, if possible.

If you're using VFP 8, you could wrap it up in a Try Catch block, as in:

try 
   *-- run your code
catch
   *-- Handle the error for a non-existent function.
endtry 

if you're using prior versions of VFP, you'd have to handle that by means of an Error method of an object, or an ON ERROR routine.

However, I'd suggest that instead of running functions, you should rather run methods, so that you could use the PEMSTATUS() functions in order to determine whether the given method is available or not.

HTH