databinding activex control for Access

Posted before with no one biting in General VB forum, so I'm giving it a try here.

I'm afraid I'm having trouble finding any examples on the net of what I would think is a fairly common thing.

I'm developing an ActiveX control (my first) intended to be used primarily on MS Access forms. The biggest component of the control is a RichTextBox. I'd like the ActiveX control, when placed on an Access form, to display a Control Source property in which to identify the datafield that holds RichText for the box on the control. I've made a public property to get at the textRTF property of the box, and defined it as a databound property in the property attributes dialog, but what else? Do I make a variable to hold the datafield and expose it as a property. If so, how do I associate that datafield with the bound property?

If I'm so ignorant that I'm not making any sense, let me know so I can try explaining again!

Thanks!
Douglas