Dockable Control (like the one in VC++)

I'm trying to create a dockable control like the one in Visual C++. I'm having trouble, though, and i was hoping someone could tell me conceptually what i need to be doing. The farthest i've gotten is getting the dockable control to appear (no tabs or lists added yet, though). I tried to create a dialog in the editor and attach it to my CDockBar, and although it shows up, none of the messages are being fired off. Can anyone help? Anyone have some sample code they'd like to share? Any help would be greatly appreciated.