forms - Making custom primary key for access tables -


i looking way make custom primary keys access tables. looking make 'c01234'. alphabet @ start has purpose , hence has there.

i know there way use autonumbered pk field , make custom field using dmax function. this: custom primary key ms access. looking not use field , generate alpha numeric pk using code.

is possible using access macro? there other way of doing ?

if use form, use beforeinsert event:

dim prefix string dim digits integer  prefix = "c" digits = 5  me!customid.value = prefix & right(string(digits, "0") & cstr(val(right(dmax("customid", "yourtable", "customid '" & prefix & "*'"), digits)) + 1), digits)

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