In the days before Visual Basic for Applications, the macro language for Microsoft Excel was called XLL. The syntax was similar to that of ordinary Excel formulas, except for two things:
- Macros were executed cell by cell until a
=RETURN()
or=HALT()
statement. - XLL functions could have side-effects, like loading DLLs (
REGISTER
).
XLL has a documentation file called "macrofun.hlp", the presence of which in the correct location would reenable the XLL wizard until at least Excel 97. Trouble is, Microsoft have taken the downloads down and removed the online reference.
Is macrofun.hlp still available? How can I find it?