Question about Customized property, list of forms in project.

Question

Hi can someone please help me, how to show the list of forms in project.

I have a button which has a customized property named FormToShow.
I want to list in dropdown all the forms in my project when i click the FormToShow Property. how do I achieve this?
do I need to use UITypeEditor?if so, how do i list all the forms in dropdown?
any inputs and samples is very much appreciated.
thank you very much.. :)