How to perform certain actions after each callback (like MVCxGlobalEvents)

The main idea is to handle the jQuery.ajaxSuccess event for the document element, which is raised after each callback.

[JScript]
 $(document).ajaxSuccess(function(){.................});

Starting with v.13.2, we've introduced the MVCxClientGlobalEvents object (see ASP.NET MVC - Provide the capability to handle the CallbackError event globally (implement an ASPxGlobalEvents equivalent)) 
It's possible to use the MVCxClientGlobalEvents.ControlsInitialized event handler for this purpose: 

[JScript]
  MVCxClientGlobalEvents.AddControlsInitializedEventHandler(function(s, e){if(e.isCallback){//some action}});

Note that this event will be raised only for DevExpress callbacks.

See also: 
Ajax Events