How to Buffer a Variable??

[Joshwa]

I *know* the answer to this; I just learned it a few days ago and now I can't remember.

When I call an API function that uses a pointer to a variable, I'm supposed to buffer the variable before it gets there. I can't remember the function to set the length of the variable!

e.g.

Dim sClsNm As String
'something goes here like setlen(sClsNm, 25)
Call GetClassName(hWnd, sClsNm, 25)
debug.print(sClsNm)

Will someone remind me?

Thanks,
--Josh