Using external dlls

Hi.

I have inherited some NSIS scripts which I have to maintain.

I have a question about some of the code used and was hoping some of you guys might be able to help.

The author seems to have accessed some external dll's using the following format -

dllname::?functionname paramlist

My question is -

How does NSIS know where the dll is?

Cheers in advance.

John

NSIS searches <NSIS directory>\Plugins and any other directories specified using !addplugindir.