stricted vertexes editing. how to?

[Yevgeny Barkovsky]

I have shape created using pen tool. When I hold mouse on this shape, visio
moves to "Edit vertexes" mode. I this mode I can change positions of my
shape's vertexes. But for me is not acceptable that shape becomes
self-intersected line or so on during vertexes editing, so I must forbid to
move vertex to incorrect position.
I can determine shape correctness by myself, but how can I tell to Visio
that no more vertex moving acceptable?
I try CellChanged event, but it fires only after left mouse button was
released.
Ok, my be it possible - to change shape's Geometry section to nearest
correct values, if these values becomes incorrect, but how can I determine
that an vertex is moving right now?

 

[David Parker]

Change LockVtxEdit to 1 in the Protection section of the ShapeSheet

 

[Yevgeny Barkovsky]

No, vertexes editing must be available, only moving vertexes to incorrect
position must be prohibited.
I think if I set up protection on Vertexes Editing during vertex moving,
vertex moving operation will be cancelled.

 

[David Parker]

OK. Then put GUARD around the formula of the vertice X and Y cells.