I'm a neat freak when it comes to message boards; a different thread for a different topic. Too bad I'm not a neat freak for my appartment though...I really should clean up more!
>> hold it's own data in the custom data area (probably a pointer to the Win32InputManager).
One concern is that it would break the applications that already rely on this custom data. But it could simply be stated that you either use the message handler as you currently are OR you use the OIS message handler and gain many features. Giving the private data to the OIS message handler could be a requirement for using the class.
My other concern is with how the Ogre team will be handling or is currently handling (although I have not found the code) switching from a windowed to a fullscreen application. They may simply destroy the D3D window or destroy both the D3D window and the Win32 window.
