VB.net toolkit, getting desparate

Hopefully one of you can help me here. I need to make some custom toolkit buttons in Creo Parametric 8 but the PTC examples don't work and the documentation seems conflicting and is very unclear about how to start. I have created an async program in VB before, also with Creo Parametric 8, but this was a sort of background worker without UI involved. This program was pretty straightforward using the documentation. Linking VB.net to the Creo UI seems impossible at this point. Has anyone succeeded? Do you have a 'helloworld' example where the application is linked to Creo and a working custom button is added?