I am having trouble guessing the data type of some of the
automation functions. I am controlling Excel from a C++
app using excel.exe to create wrapper classes for
Application, Workbooks etc.

example: in C++ the Sheets.SaveAs code reguires before,
after, count, etc as arguments. I know what they all mean
from the VBA object model help; but are they shorts, longs
etc to cast the colevariant you have to use??

Does anyone know where I can get hold of an online
reference so I can look these things up quickly???

Regards,
Kevan