What's the difference between RealGetWindowClass and GetClassName? (or what is a "Window type" versus a "Window class name"?)

There is a difference in the description on MSDN, however, I do not understand what the text means what the difference is.

The GetClassName function retrieves the name of the class to which the specified window belongs. The RealGetWindowClass function retrieves a string that specifies the window type.

As an example using windows calc.exe
From GetClassName you get "SciCalc"
From RealGetWindowClass you get "#32770"

I guess what I'm really asking then is what is a "Window type" versus a "Window class name"?

From stackoverflow

• See the following article: http://forums.wincustomize.com/3258