Brian,

I have a feeling this is due to HostObject not having a RefBizObj. Remember, HostObject is merely a reference to an object that hosts the ImmBusinessRuleHost interface. Not all compliant objects (mmBusinessEvent for example) have a RefBizObj collection. For this to work, you'll have to cast HostObject to mmBusinessObject or one of its subclasses:

(Sorry, not quite fluent in VB.NET, but I'll give it a shot <s>)

Dim loContact as Contact
Dim loClient as Client

loClient = (Client)me.HostObject;

///Now that you've cast loClient to a subclass of mmBusinessObject, typing "loClient." should bring RefBizObj in your Intellisense.
oCOntact loCOntact = (oCOntact)loClient.RefBizObj.Get(typeof(oCOntact));

I also noticed while typing this that your example has "oContact" in your call to typeof(), and "oCOntact" in the rest of the code. That will definitely bite you as well!

Hope that gets you on the right track,
---J

>Cathi,
>Did you run code similiarto your sample? I've tryed every consevable varyation and it wont work. Is the sample c#? HostObject.RefBizObj doesn't show up via intelli senese.
>the code below is one way I tryed it, but this wont run.
>the referance I'm creating loCOntact, The Rules host oClient, oClients child is oContact
>
>
>Dim loContact as Contact
>oCOntact loCOntact = (oCOntact)me.HostObject.RefBizObj.Get(typeof(oContact));