The additional functionality in the DevExpress wrapper has to do with the results being visible and the search field selection being automatically managed.
You can do yourself now by using the "Visible" check on the search field item. The DevExpress wrapper just goes ahead and implements this functionality for you...and some day we will more than likely back up and add this for the standard BrowseDialog as well...but for now you would have to do this manually.
P.S. In the post options do I need to set the Topic Subscription Notification Type to Immediate Notification every time I make a post in the same thread to get notification when a reply is posted?
You got it 