3 buttons, Emacs detects that at startup, and all the 3 buttons function
normally, as on X.
+ Help strings for menu-bar and pop-up menus are displayed in the echo
+area when the mouse pointer moves across the menu items.
+Highlighting of mouse-sensitive text (@pxref{Mouse References}) is also
+supported.
+
@cindex mouse, set number of buttons
@findex msdos-set-mouse-buttons
Some versions of mouse drivers don't report the number of mouse