OpenGL and WPF: Integrating an OpenGL Window inside a WPF Window

This is an unconventional alternative to using WPF controls that are specifically designed for interoperability with OpenGL (such as OpenTK's GLWpfControl, or SharpGL's OpenGLControl). Instead, it simply creates an OpenGL window and adds it as a child window of the main WPF window, making it look a region of the main window. It stays "glued" to the main window, i.e., it moves with it and even resizes itself with the main window. There are advantages and disadvantages to this approach, which will be discussed in this article, but the undisputable advantage is unhindered performance - you get the original performance of OpenGL, not something that aspires to get close to it.