Not a native control; must be part of some third-party library. There are a few of them, with the number one Google result from CodeProject[^]. Unless you can point out where you encountered it, we can only guess which implementation you've seen.
Bastard Programmer from Hell
if you can't read my code, try converting it here[^]
Last Visit: 31-Dec-99 18:00 Last Update: 30-Jul-15 7:35