From a colleague:

"I've been tasked with writing a component that needs to be pooled. This
on it's face seemed pretty easy, but now after working with it for a
while, find the documentation severily lacking, expecially relating to
transactional pooled componenets.

"I've implemented IObjectControl and think I've got that nailed down.
According to the documentation, I need to enrole in the transaction
manually and to disable auto enrollment. Unfortunately the only
documentation I've found tells about turning off auto-enrollment for the
machine, not the componenent. Does anyone know how to do this on a
componenet basis? Or, better yet, have a code sample that works using
ADO?"

We've found an article at
http://msdn.microsoft.com/library/techart/scalobjpool.htm#scalobjpool_manual
that shows us how to manually enlist, but it doesn't illustrate how to
disable automatic enlistment. My colleague continues:

"What will happen is that the object will be created for the pool, either
immediately before it's needed or on demand, when the connection is created,
it will auto-enlist in a transaction and never remove itself until the
object is destroyed, which in a pooled object isn't possible to determine.

"But I did just find a way to create ADO connections without enlisting. You
use a attribute on the connection string called "OLE DB Services" it has
several values, one being -4 for "All services except pooling and
auto-enlistment" which is what I want, since I have a connection and don't
need pooling."

Any ideas would be appreciated. Thanks.

Jeff Ferguson, MCSD
Senior Consultant
Magenic Technologies
corporate: http://www.magenic.com/
personal: http://staff.magenic.com/jefff/default.asp

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