The ButtonEx control was renamed to Button2 in the SDF 2.0. So these
controls are essentially the same control. The changes for Button2 include:
* The class name ButtonEx (v1.4) changed to Button2 (v2.0)
* Button2 inherits from ButtonBase2 (v2.0) instead of ButtonBase (v1.4)
* Removed the obsolete property BackgroundImageDisabled (v1.4), should now
be using only DisabledBackgroundImage (v1.4, v2.0)
* Removed the obsolete property BackgroundImagePressed (v1.4), should now be
using only ActiveBackgroundImage (v1.4, v2.0)
* Removed the AutoSize property as it wasn't implemented to handle
autosizing the foreground content which is what is expected of an AutoSize
property, this may be re-added at a later date
* Removed DefaultFont property
* Removed DefaultSize property
Other than that, you should be able to use the docs for ButtonEx at this
point.