Prime app variables

[Jonathan Cameron]

Could someone point me to information on how app variables work in customized Apps?

Here are some of the questions I have:

1. When you create a customized Solver App called MyApp, and you set the equations in the App code, when does that definitition get set? I tried this and I could edit the equation but I was not sure when the predefined value took effect. I tried doing "Start" for the app and the edited value remains. For instance:

Code:


   Export MyApp()
   BEGIN
      MyApp.Eq='x^2+y^2=1';
   END

2. How do I define and use app-specific variables? For instance, if I define like this:

Code:


   Export v1;
   Export MyApp()
   BEGIN
      MyApp.Eq='x^2+y^2=1';
   END

Here is what I understand:

1. When MyApp is active, I can access v1 by using 'v1'
2. When MyApp is not active, I can access it by MyApp.v1
   

What is confusing me is that when I look at [Mem] and look at user variables, I see entries for all the variables I defined (with EXPORT) in MyApp--but without any MyApp prefix (even when I have another app active)--and it does not offer an option to delete it. Why doesn't it indicate what App it is associated with? When I edit it, it does have the value set my MyApp, so I'm sure it is for that app. When I define the same variable in two different Apps, I see the same name twice in my "User Variables" list under [Mem] -- without any obvious way to distinguish them (other than Edit-ing).

The act of putting togther this post has helped me understand this better, but I would still welcome any suggestions on best practices/advice, examples, and documentatoin.

Thanks

-Jonathan