In MSIE I am very rarely able to get it to capture using:
<SCRIPT  LANGUAGE="VBScript" FOR="NCHSAlert"  
EVENT="Notice(strPriority, strMessage1, strMessage2,
strMessage3, strMessage4, strMessage5)">

I have tried the following but they seem to never work:
Sub NCHSAlert_OnScriptletEvent (strEventName, varMessages)
<SCRIPT  LANGUAGE="VBScript" FOR="NCHSAlert"  
EVENT="onscriptletevent(n,o)">
 Please note that in the first excerpt for some
undetermined reason MSIE does work sometimes - just more
often not.

Does anyone have any comments?

I did a ATL object, it fires an event to the container.
If the event is driven by another event from IE, (ex
mousedown) it works ok, but if it is fired by an internal
generated event it don't work!   On any other container,
like OCX Test Container or any VB application the control
works great!   Now I know, the problem seens to be the same
with VB...  May be one more "by design behavior" of the
IE...  I found nothing about it on MS docs...