Filter Listbox

[Lyncroft]

I have a listbox detailing countries that I use to run a query depending on which countries are selected. The list has become very long so the user wants to filter out the EEC ones and non EEC ones.

I thought the best way would be to add a column for EEC to the underlying countries table and tick those in the EEC. What I need to do but don't know how is to place buttons next to the listbox to filter either EEC or non EEC.

I bet it's dead easy but just can't get my head around it unfortunately. Any ideas?

 

[Mile-O]

Have a look at this:

 

[Lyncroft]

Cheers Mile-O-Phile. Thanks for responding so quickly. Added your download to my favs folder!