All you need to do is set lcWhere to whatever expression you want. That can be anything that evaluates to a value expression. Some examples:

lcWhere = '(dCreate > tdCreate or empty(tdCreate)'
lcWhere = '((X <= Y and Y > Z) or (A = B and C < A))'
lcWhere = 'x*5+3 > A-2/B'

The point is, it doesn't matter what variables you need in the WHERE clause. They can be completely different every time.

>Hi
>
>But I need establish properties every time for update the data source?
>Anyway, I create a view using eview (UT files!!!) with where like:
>where dCreate>?tdCreate or empty(?tdCreate)"