When I used addproperty method and later save as class
I recieved new classes with new properties.
But it did not work for page.
For example I created some pageframe and used addproperty method to add some properties to pages.
The properties worked well, but when I saved class with saveas method and opened it later with class designer later, new user properties dissapeared/ I was so angree, that opened classlib as table and added new properties there. This trik always helped me with rest of the classes. But with pages it did not work to