OpenGL DirectX interop problem

Hello to everyone,

I’m trying to make render with mix directx and opengl. I have encountered on a problem when wglDXOpenDeviceNV returns null and GetLastError() returns 0 like there is no any error. Does anyone know what it can be or what does it mean ?
Or maybe anyone can give an advice how to debug and find the way out. This extension for interop looks very interesting, really I don’t want to return back to system memory copying between directx and opengl textures.
I’m making DirectX context without swap chain, only framebuffer for the offline render.