This section describes the Windows-specific variables related to the mouse.
w32-mouse-button-tolerance specifies the time interval, in milliseconds, for faking middle mouse button press on 2-button mice. If both mouse buttons are depressed within this time interval, Emacs generates a middle mouse button click event instead of a double click on one of the buttons.
If the variable
w32-pass-extra-mouse-buttons-to-system is non-
nil, Emacs passes the fourth and fifth mouse buttons to Windows.
w32-swap-mouse-buttons controls which of the 3 mouse buttons generates the
mouse-2 events. When it is
nil (the default), the middle button generates
mouse-2 and the right button generates
mouse-3 events. If this variable is non-
nil, the roles of these two buttons are reversed.