[3/7] dinput: Added enumerated devices to ConfigureDevices dialog

[Lucas Zawacki]

> It doesn't make sense to pass the info as WM_INITDIALG parameter if it's
> going to be stored in global variables anyway. A better way would be to
> store this in the window info.
>

Any pointers on what's the set of winapi functions used to store and
retrieve data in windows? I've searched MSDN for almost 30 minutes and
no luck.