Web Plugin <-> plugin AND plugin <-> plugin relationship

[Taugeshtu]

Okay, I got several questions:

1. How can I get some parts of one plugin (for example, a global variable) from another plugin?
2. I'm using following code:

Code:

WebPlugin:AddTab( "(Re)Generation", HandleRequest_Generation )

How often "HandleRequest_Generation" is executed? Once every time the tab is refreshed in browser?

Thanks.