how to add control similar to 'contact button'

[GolfGal]

I'd like to add a control to a form region that when clicked would open the
drop down list of contacts, similar to the 'contact button' at the bottom of
the contact form, or the 'to' in the message form.

This control would be named 'broker' and when clicked another contact would
be chosen.

Thanks

 

[GolfGal]

Anyone have any thoughts on this?

Also, is it possible to have a drop down control that pulls its possible
entries and limits them to cells on an excel worksheet? I'm not a 'coder' so
any direction to possible links for code to do this, or an example would be
dearly appreciated.

Thanks