Changes
/* Usage */
If you don't receive a status for the mouse buttons, the last status is still
valid.
Example:
Pressing left button only and releasing it will show &c1, one or more zeros and then &c0.
If you press and hold down left button you will see &c1, and lots of zeros until you release then it shows &c0.
The hardware will only give you the actual data that has changed, so if only moving left you will only get X offset values and no Y offset or button values.
== See also ==
