C# ViewportControl strange behavior in rhino

Hi,

I’m trying to use ViewPortControl in a Rhino Panel with ETO. Everything is showing ok, but I have a weird bug:

  • When I type a command in rhino (for exemple “Line”)
    → I can’t draw the line in the viewport control , maybe it is by design
    → BUT if I activate the main Rhino viewport, I also can’t click to select point, I can’t do “ESC” to cancel the “Line” command, I can do nothing. The only thing I can do is to close Rhino and restart

Exemple in image

I have not tested yet on Windows, but on macOS 26.4, Rhino 8.23 this doesn’t work well.

Does every one at McNeel could help on this ?