From a recent email: 

In reading some of your posts, it appears that VSTools for GP is not the best tool to use to generate a multi-line sales order from an external data source. Am I correct? Is the best tool (in your opinion) eConnect? Does it provide validation/defaulting based on GP setup?
Thanks.
Seth

VS Tools is used to generate forms for data entry in Dynamics or to add logic to existing forms.

 econnect is the tool that we use to get that data into Dynamics.

That help?

Thanks. I was hoping to create an experience where the user fills in the customer information, selects a document to import, and voila, the screen fills the order inventory information complete with defaulting. It appears what I might do is generate the sales order document via eConnect from an Add-In, then load the newly created document so the user can review.