Actually, I can… I could even write a book on that !!! No, kidding… .
Well, I had one problem when removing the CS_OWNDC bit in my 3D Modeller.
Let me just tell you a bit about my architecture: I use one Rendering Context (RC) per document and then one Device Context (DC) per view. That enables me to share Display Lists and textures without using wglShareLists and save memory.
Then, I can pick / transform objects (hey, that’s a modeller !). When removing the CS_OWNDC bit, I sometimes had glitches in the other views while transforming in one of them… Those glitches did never happen when using CS_OWNDC…
I must say I do not know for sure why these things happen… but they do !
So, stay on the safe side, and register your window class with the CS_OWNDC bit !!!