I had noticed that if I had "Disabled" plugins in my plugin directory, that had Message ID functions listed under MyNotify(), that when I was using
my "Message Capture" plugin (in finished plugins). That those Plugin Mynotify functions WOULD REACT!!!!!
I have ALOT of plugins in my directory, I was testing the "NotifyPlugins(6000)" and a "Video Window" configuration opened., I have a Galil plugin that was
disabled, and I had tried 5000, well that launced one of the Galil notify functions......
So, I asked Art about it,  Here is the solution he gave me. I used it in the Capture Message Plugin, and the new MAD 3.7 (will get to my others later).
As a Global Variable Put:   bool PluginEnabled = false;
Art said, myPostInitControl() is only called if there is a Green Check for that plugin so... 
void   myPostInitControl ()
{      
   PluginEnabled = true;
                 /// rest of your code.
}
Then in myNotify(int ID)
void   myNotify ( int ID)
{   
   if( !PluginEnabled) return;  //If false, it will jump out so any of your ID == # statements will not react 
                 /// rest of your code.
}
scott