ps 2 mouse packets usb mouse reports under windows vist

Hello Everybody,
Back in 2004, Microsoft said that Vista was going to support the new WM_MOUSEHWHEEL message for horizontal scrolling (tilt wheel), which implies that tilt wheel data will be part of the standard data packet sent by a mouse to the OS. Does anyone know if any information has been published about the standard PS/2 packet structure for a mouse with a tilt wheel? Will there be any other information contained in the new packet format, such as the 4th and 5th buttons? If there are more buttons, what functionality is expected from them? How should a tilt-wheel PS/2 mouse report itself to the system to inform that it supports the new packet structure?
Has any information been published about HID usage pages and usages to be used to transfer tilt wheel values to the OS over a USB connection?
Any leads will be greatly appreciated.
Thank you!

buttons #4 & 5 support in ps2 have been present since at least winxp, maybe even win2k. IIRC, the wheel data byte got split into 2 nibbles (0xF0 and 0x0F) and the new buttons were put into the upper nibble. download the DDK and look at the pnpi8042 sample and the ISR code in moudep.c. as for the tilt wheel, i don't know. d
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"Abjad Hawwaz" wrote in message

Hello Everybody,
Back in 2004, Microsoft said that Vista was going to support the new WM_MOUSEHWHEEL message for horizontal scrolling (tilt wheel), which implies that tilt wheel data will be part of the standard data packet sent by a mouse to the OS. Does anyone know if any information has been published about the standard PS/2 packet structure for a mouse with a tilt wheel? Will there be any other information contained in the new packet format, such as the 4th and 5th buttons? If there are more buttons, what functionality is expected from them? How should a tilt-wheel PS/2 mouse report itself to the system to inform that it supports the new packet structure?
Has any information been published about HID usage pages and usages to be used to transfer tilt wheel values to the OS over a USB connection?
Any leads will be greatly appreciated.
Thank you!