CBT Hooks in Windows... What does "CBT" stand for?

Here's a quick one.

I'm starting out with usin开发者_运维知识库g hooks in in Windows, and I notice that there's a hook type called a "CBT" hook. Though I know how it's used from the documentation, what does CBT stand for, exactly? I'm having a bit of trouble finding that in the docs...

CBT stands for "Computer-Based Training". In addition to its original, intended purpose of enabling instructional software, a CBT hook is most commonly used to provide notification when a window is created, destroyed, activated, resized, moved, minimized, etc.

See the CBTProc Callback Function docs on MSDN for more information.

It stands for Computer Based Training.

I believe it is "Computer Based Training": it's intended to be used in (very basic level!) instructional software that shows the user how to move and click the mouse.