add property to list container controls??

[Eidolon]

I want to add a property to my webcontrol which works like the
"SelectedObject" property of the Windows.Forms.PropertyGrid control. Is
there a built in editor or do i need to write a custom one.

How can i make it so that if i drop my control on a page, then select my
property in the property browser, and i will get a drop-down list of the
controls on the webform?

Thanks in advance,
- Eidolon.