Ken --

Thanks for your reply.. I tried to get to the PR_CONVERSATION_TOPIC /
PR_CONVERSATION_INDEX property of the response mailitem in the
mailitem_open event. Those properties are not available. Do you have
some sample code I could use?

Here is what I am trying to do. I have a UI element in the inspector
whose value is set to the value of a custom property I set. So when a
user opens a mail item, the property is read and value for the element
is set. Now when the user replies or forwards this message, I have to
set the value of the UI element in the new message. This value has to
be same as the value in the original message. I try to do this in the
MailItem_Open event. But those properties are not available in the
MailItem_Open event for response.

Sample code would help a lot..

Thanks

Sanjay