Comparing if a selected value is equal to a value in another field

[microwin88x]

Hello,

I have a Listbox with different values in a field with periods (format: YYYY/MM) like 201202, 201203, 201204, etc.

What I need is to compare if one of the selected periods (for example, 201202) is equal to the same value in another field (which is not selected).

I need to do that in a Simple Table object as a conditional.

Do you know how to do that?

Thank you!