Here we have a tutorial about creating a panel:
I am very impressed with Graphisoft's growing knowledge resources!
I learnt most of this on my own, by pulling apart the Graphisoft objects (hours!). I was also fortunate, after all my hard GDL work, after 10 years, to have the privilege to visit Budapest and sit with Csilla Mai and get the full word on how the CW elements work form a GDL perspective.
This was a great opportunity for me and one not many will get, hence it is all the more important that these resources are made available. Well done again Graphisoft.
Creator of Cadswift's parametric GDL libraries
Creator of Infinite Openings and Component Catalogues
Push the envelope & watch it bend