Browse Lookup in Selection Processing

[Chris Rendall]

Is it not possible to do a browse lookup in a selection processing?  I
have an input popup field for the customer number, but if the user
doesn't know the customer number I'd like them to be able to press
enter and get a browse lookup window with a list of customers that
they can choose from.

I coded the browse lookup but the code doesn't run in selection processing.

Chris