DNN currently only supports one primary view on a normal page.  

This is the view you declare as View in your module config.

All other views are accessed using mid= , ctl= query string values - you can query those values in your code to find out what view is being displayed.

But - in reality - since ascx controls are instanced onto the page only when needed - for what exact reason are you wanting to work out which control is being displayed?     The page_load event of ONLY the controls that are currenly loaded will ever be fired during any one page cycle - this will tell you that the control is loaded.

Westa