[kh99]

I don't know of any documentation, but I threw together a bare bones example of adding a field to the thread table, and I've attached the product xml (you'd only want to import this to a test forum). Two things this example doesn't do: create the database field and add the input field to the newthread template. I called my new field "test" and made it a string, so to use this example product you'd need to add a field to your thread table called "test", and add an input control to the form in the newthread template, and set name="test". Alternatively you could edit the code and change the field name and type to something else.

If you have any questions please ask, but if you don't already have the vb source code set up so you can search it, you should do that. If you search for the hook names you can see a little about what's going on at the point where each plugin in executed.