Creating a direct link to a purchase order without using crystal reports functionality

[williambrochensque]

I know this is a bit of a specific question, but:

When on a crystal reports, I create a clickable asset using a URL on a formula, like the following:

'http://$b1$/link?table=' [...]

What does SAP translate the "$b1$" part to?
Is it my SAP installation address and SAP integration framework port?

Tried using it to create a direct link that could access a purchase order directly from the browser to the SAP B1 client itself, but had no success (And I'm pretty sure it is not possible, but it's a good question anyway).

And, is there a list of the possible parameters that can be used on a crystal reports? (Like the $b1$ parameter).

Thanks!