Added object properties for more than one object.
Added error checks for acquired.
Default to using c_dfDIJoystick2 data format.
Try to use user supplied data formats (only works if same as one of
the defaults).
Code cleanup, error checking and tracing added.
Added support for up to 8 axis.
widechar classes.
- fix a stupid bug in callback handling caught by Lionel.
- add some forgotten IID on class factory (better if we want to active
the code)
- many cleanups on COM Macros (don't need A and W variants as they are
the same)
Implemented circular buffering for the dinput mouse device.
Mapped the mouse warp on the center of the cooperative window, which
should make windowed games work better in managed mode.
