I try to implement a MDI application with MSVC6 on a NT-machine. If I create a OpenGL-View everything works fine with the first window. If I open the second window the content of the first window disappears or gets blank. Sometimes the second window will show the content of the first window. I create a context and switch it in the OnDraw-function (wglMakeCurrent), I switched off/on double buffering, nothing helps. Is there anywhere an example with a MDI interface in source code which I can download and analyze?