I have problem with render second window under Windows 8 and 10. Noesis doesn't show anything, only empty window with OpenGL color. It looks like there are controls but not visualy (are not displayed), because if I click on the empty area where button for open window should be, it open another empty window.

Under my notebook with Windows 7 I can open many windows and everything is ok. Unfortunately, I can't test other PC / notebooks with Win 7 because they have no OpenGL support.
I use shared context and rendering.

Unfortunately this seems to be a GL problem and not a Noesis issue. Not sure I can help you here. Are you able to render pure GL content in the second window?

Are you able to render pure GL content in the second window?

I think yes, when I open second window (on win 8 or 10) it render glcolor as background, but Noesis graphics is dissapeared (on second window).

Does it work if you use the same GL context?

Yes, even there is Noesis UI behavior but, Noesis graphics is not renered (but opengl color from glcolor() is there). For example if I click on the window where should be button on second window, it create another window, but is empty too as second window. But behavior is still here.

So, if you use the *same* context it works right?

I apologize for late answer.

It depends, on Windows 7 is everything OK, on Win8 - 10 not.