Formatted search for a combo box

Hello all,

I want to define a formated search for selecting a value of a combo box. I've already defined the query and it works if I use it in a text variable, but I need it to work for a combo box.

I want to select a value in the service call form through an user defined field value. How can I do this?

My query is:

SELECT name from OSCP where descriptio like $[$U_CODPOSTAL.1.0]

Can someone help me please?

Thanks in advance!

Mariana Mazzero