Hi Ben.

I'm not sure about why you can't add then to an array. It seems a bit odd, but I don't have the time at the moment to play with it and find out. There are two other things you can try though -
Instead of an array try a Collection. Being an Object it might be more amenable to working the way you want.
Add a Container to your form and then add the classes to that. You can add them with a random name (sys(2015) for example) and then use the Container's ControlCount and Control array to access them.

Ian Simcock.