Visio via VB.NET: how do I determine the intermediate points in a dynamic connector ?

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VB

Visio

I load a visio file containing a process diagram (e.g. flows, temperature and pressures, not decisions) to calculate how it performs.

I need to determine the intermediate points on a dynamic connector to place some information in a sensible position. Not good with the connection points as things get too crowded there, so somewhere midway between the shapes the dynamic connector connects to. But if it routes in a complex way it's not enough to know the Begin and End points.

So how do I get that info ?

A side question. When I expand the 'Dynamic view' of a shape in visual studio, I see the 'Title' field, but if I try to add shape.Title to the watch list I get an error - what's with that?

Thanks in advance

What I have tried:

Looked through the shape object in Visual Studio
Looked at dozens of online topics