struct's

Hi, I have a dialog based MFC app with 4 property pages. I have twenty variables to pass between the property pages and my dialog box. What is the best way of doing this? I assume that placing the variables into a structure is the best way, but now how do I use it and pass it between my dialog box class and the property pages classes? Added information is that the variables are initialised and used in the dialog box class, but the property pages are used to altered the variables. If possible, please show me through a simple example how to pass the struct around, assuming of course that the struct is the best way to do this. More added information is that I have been using global variables to start off with, and I want to move away from this to the struct, or whatever. Thanks.