Hello.
I was looking into making a gui in windows and then make Irrlicht draw in only a part of that window but noticed Irrlicht always creates its own window to draw in. I know Irrlicht has its own gui but I think that's more suitable for in-game gui's whereas I was thinking of making more of an editor which could benefit from the more advanced gui-elements offered in the OS.
The question is more or less if there could be a way for the user to create a window for Irrlicht to draw in? Maybe it doesn't even have to be a window as long as it's a drawable surface. How about just passing a hwnd to Irrlicht, would that work?
About the window Irrlicht draws in
Currently, that's not possible, but I also have thought about it. I think this is an important feature I will implement in the next version. Until then, you could Irrlicht let create the window, get the HWND of this window and add your gui objects to it. (In Windows this is possible, don't know about Linux). Another solution would be to have editor tool palette and other windows in a separate window. (You know Delphi? 
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Tope