In 3.0 SDK use the template called Data From AddIn Spec

Select the form that you would like to add too.

In my Sample I used the Event Edit Form 3.

In the vb I added the following to the OnInit()

Me

Then using Catalog Browser, I loaded the spec

Tested and the checkbox is now enabled.



.DESIGNATIONSONFEES.Enabled = True    

I then built the project and placed in the bin/custom folder