Max,

>So I'm guessing that I could override HookParentTransactionBegin() in my parent business object and store the handles passed in the eventarg somewhere with global scope. Then in the CheckRulesHook of my child rules object I would need to retrieve the connection handle and use it when executing my query. I have no clue how to do that.

If you want to store information that is globally accessible, you can create a static field or property in which to store the information. For example:

public class MyClass
{
   public static mmBusinessStateChangeEventArgs TrxEventArgs;
}

Regards,