What is this interactive graph-drawing control?

Question

What UI control is used to draw this interactive graph diagram?

Facts about it:

• It's from Excel's Inquire add-in. It draws dependency diagrams of cells, worksheets, workbooks in a form of graph diagram.
• You can auto-layout graph nodes, drag them to another place, expand child nodes, highlight dependent and precedent nodes.

Answer 1

Judging by the DLLs installed with the add-in I would guess it is the GoDiagram control from Northwoods Software.

http://www.nwoods.com/products/godiagram/index.html

The DLL is Northwoods.Go.DLL if you want to search for it. You will also find that tool uses third party DLLs from SyncFusion and Infragistics so I'm not sure if it's a pure implementation of GoDiagram.