How to create a C# Winforms Control that hovers

Question

How can you create a C# Winforms control which goes out of the bounds of its region? Such as a drop down box. Kind of like if you had a DropDownBox in a Small Sized Panel.<

Answer 1

There is a good article here:

http://www.vbaccelerator.com/home/NET/Code/Controls/Popup_Windows/Popup_Windows/article.asp

This has a class which handles some of the tricky aspects of getting this to work correctly, such as keeping the application window titlebar active, handling Alt-Tab and cancelling with a mouse click.