ASP Classic - Transaction timeout configuration

Hi,

I couldn't find any information about how to extend / shorten the transaction timeout for an ASP classic transaction.

I'm starting my transactions with this code :
<%@ TRANSACTION = Required %>

And then handling the result with
OnTransactionCommit()
And
OnTransactionAbort()

I've found how to do what I want for ASP.NET all over the web, but there doesn't seem to be any information about ASP classic.
I know it's a language as dead as Latin, but still, some old applications still use it, and the lack of information make it such a pain to maintain :/

Thanks for any help provided !