In vfp 9 you can skip the is null and just use the additional parameter
in vartype.
For numbers you need to check if they are ints etc, strings if they are
empty (if they shouldn't be etc), check for illegal characters.
I try(!) to do this for all procedures anyway as it cuts down
development problems. Although a lot of the tests are then in asserts.
I suggest creating a set of functions that you can call to do this if
you are in earnest which will make it easier to code.
The problem with Dominics approach (using case) is getting a meaningful
error message back (e.g. invalid number of parameters etc.)
P.S. Dominic... is that job title getting longer?
--
Michael Hawksworth
Visual Fox Solutions
[EMAIL PROTECTED]
www.foxpro.co.uk
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