How to get seam orientation widget in C++ SDK?

@pagarcia wrote:

Hello,

When running Loft over curves I see this interactive black line that joins pivot points over them, with an arrow that I can click over to reverse orientation.

seamPoint.png1710×1120 115 KB

How can I get or use this widget in the SDK?
It’s different from CRhinoGetPoint in the sense that I can click and drag a point that is constrained to a curve, as long as I want till I click OK (on the contrary, CRhinoGetPoint::GetPoint() just lets me click a point once).
I guess the rest is done with display conduits on the fly, though I’d also like how to draw and select that arrow, is it in the SDK too?

Many thanks,
Pablo

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