Hey Marcio.
Also, if the ClientId is the foreign key for the Clientes table, where the name is stored, you just use a combobox for the search key on your BrowseDialog.
So, you would add the ClientId as a SearchField:
Then, on the Search Field Criteria, go to Combo - Business Object tab and click the "..." button, which will lead you into the List Population Settings dialog. There, you set your foreign table, its Fill Method to execute, Display Member and so on:
Doing that, once you run your BD, you just choose the Client from the combobox that will be populated with your clients, and the BD will search on this ClientId: