03-09-2010, 05:17 PM
Join Date: Mar 2008
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The normal case is to add a custom menu option. In 5.0, you can control which items in the list get your menu item (but no on earlier releases).
I think I also answered your question on the RIM forum. You can set up a listener to catch the "open" message event, and you could conceivably invoke a global-modal screen triggered by this event.
However, be aware that the message listener will be called from, the context of the Messages app, not your own app. This means (for example) that you will not be able to push a screen from this listener thread. You'll need to notify your app of the event (possibly using the global event mechanism) to trigger the screen push.