BHO Invoke problem

[Mr. Burns]

Hello,

I have devloped an Browser Helper Object (BHO) which holds a child browser
as GUI.
In the SetSite method I have created an event sink using Advise(...) for the
main browser window to notice my BHO on main browser events.
The same I did for the child browser. It works fine so far.
Now my problem. Because ther is only ONE Invoke method for my BHO all events
for both browsers are handled by the same Invoke method.
For some DISPID_XXX I can distinguish the browser which sent the event by
evaluating the pDispParams->rgargv[1] parameter.
But for DISPID_STATUSTEXTCHANGE I cannot, there is no parameter I can check
which browser causes the event.

How can I check now which browser sends the STATUSTEXTCHANGE event even I
have only one Invoke method?

Thanks for any help!