I was wondering if someone can point me to a simple C3PO sample that I could look at?

I'm trying to create a basic C3PO to put a button on the toolbar that will allow sending of a message with customized values. I took a look at the Wizard and tried to use that to make a basic C3PO, but I cannnot get an icon to appear on the toolbar. I'm doing this in VB, using Visual Studio 2010. I've worked with the Admin APIs a lot, but never a C3PO. Is there anything out there I can look at? At this point, I cannot event get a dummy button to appear on the tool bar (I'm using a Windows 7 machine). Thanks.