I figured things out.

For anyone who may have the same kind of problems, here's where I was lacking in my understanding.

I was basically wanting to have a button on the builder form that would allow me to perform further actions on my "mycontainer" object. The button I wanted to use was a class I had created (detailbutton).

1) I had to subclass detailbutton from buildercommandbutton found in builderd.vcx.

2) Instead of placing detailbutton in the Links area of the mycontainer record in builderd.dbf., I placed a property of the mycontainer object.

3) I changed the record for the detailbutton in the builderd.dbf table so that it was now a property record for the property of step 2. However, I listed the detailbutton as the classname and it's classlib in the classlib field.

That seems to work. Hope this helps someone else.