Igor
Excel worksheet functions can access properly registered xlls - thes
are basically dlls with a bit of excel specific registration info in.
They can also access correctly registered automation add-ins (active
dlls).

In VBA you can access xlls and native dlls through the 'declare
statement, and you can access activex dlls through create object or b
setting a reference.

cheers
Simo

--
Simon Murph
-----------------------------------------------------------------------
Simon Murphy's Profile: http://www.excelforum.com/member.php...fo&userid=2653
View this thread: http://www.excelforum.com/showthread.php?threadid=39862