Construct the window from an existing control.
*
Use this constructor if you want to create an OpenGL rendering area into
an already existing control.
*
The second parameter is an optional structure specifying advanced OpenGL
context settings such as antialiasing, depth-buffer bits, etc.
*
Construct the window from an existing control. * Use this constructor if you want to create an OpenGL rendering area into an already existing control. * The second parameter is an optional structure specifying advanced OpenGL context settings such as antialiasing, depth-buffer bits, etc. *