We have developed custom web part in the SharePoint 2013 where we are doing a date filter and passing the value to the custom data provider.
In custom data provider we were able to create a data-table and return the same back to the visio.

Now we need to know how we can receive the date and pro-grammatically link the data to the shapes. Please let us how we can write a VB script to receive the data from the custom data provider and link the rows to the shapes.

for things sharepoint and data providers, I start over at the other chris' site

http://blogs.msdn.com/b/chhopkin/

al Edlund