Zone Actions

Zone Actions are similar to Event Actions but they're not automatically invoked in the same way as EventActions.

These are normally invoked by MessageTarget methods: the target for SendMessage.

Here's an example from TpSlideShow (edited for brevity):

protected void Access_ActionToTilePacket(ActionToTilePacket sentPacket)                                                                                                           
{                                                                                                                                                                                 
    if (sentPacket.SourceInstance == this)                                                                                                                                        
        return; //avoid recursion.                                                                                                                                                
    if (!m_AcceptsClicks)                                                                                                                                                         
        return;                                                                                                                                                                   
    if (sentPacket.Delay != 0)                                                                                                                                                    
    {                                                                                                                                                                                                  
        TpLib.DelayedCallback(this,()=>ChangeSlide(SlideIndex == 0,false,false),"DelayATTP_Slideshow", sentPacket.Delay);                                                         
        //note that ZoneActions may not may any attention to 'eMode'.                                                                                                             
        if(m_ZoneAction)                                                                                                                                                          
            m_ZoneAction.Exec(this, this.GetType(), m_ZoneTargetTag, ObjectPacket.EventsPropagationMode.ZoneEvents,"",SlideIndex);                                                
                                                                                                                                                                                  
    }                                                                                                                                                                             
    else                                                                                                                                                                          
        ChangeSlide(slideIndex == 0, true,sentPacket.PostEvent);                                                                                                                  
}              

So this