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

I did something similiar to that recently, and I used a ListBox. The cool think about a listbox, is that you can display it anywhere you want to, even out of bounds of your control. That way, when you detect via a button click or whatever, that you need to display the DropDown that you want, just populate the ListBox and display it anywhere you want. I got the idea from here:

http://msdn.microsoft.com/en-us/library/aa480727.aspx

They show how to build a Custom DataGridView with filtering, and to display the filter values, they place a ListBox under the header cell.