I was able to use a GLControl inside a windows Form as indicated in the tutorial on this site.
Moving the same code inside a user control and using this new user control inside a winform I was not able to see any rendering except the one at the initialization phase (Backgroud color)
I tried to derive the user control directly from GLControl too, but i had the same problems.
I had no exception and the data are correctly generated (I saved on a file the results of the texture to display) but seems that is rendering occurs even using the commands MakeCurrent on each function call of the user control.
Any suggestions or is wrong trying to use a GLControl inside a UserControl