>
>Not in a straight connection with the subject: if you need abstract classes, define them based on VFP class Shape (if possible). According to Steven Black, it's the fastest subclass and it's the less memory consumer also.
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>Take Arnon's advice: don't use random for primary keys. Make a mechanism to be sure the key is unique.
>
>Vlad

Arnon and Vlad:

I am happy to take your advice. What I am doing now is generating the number and , in a DO WHILE loop, SEEKing it and re-generating it until !FOUND(). If I put the primary key in a table, how do I generate it? By just adding 1 to its existing value? In a busy network, am I liable to face contention problems?

Thanks, guys, for the help.

John