BBC BASIC Programmers' Reference

by Richard Russell, January 2011

You can swap the mouse buttons, that is reverse the normal actions of the left and right buttons, as follows:

        SYS "SwapMouseButton", 1

To restore the conventional functions for the buttons use:

        SYS "SwapMouseButton", 0

Note that the mouse is a shared resource, so any change you make will affect all applications and utilities, not just your program.

You can discover whether the mouse buttons have been swapped as follows:

        SM_SWAPBUTTON = 23
        SYS "GetSystemMetrics", SM_SWAPBUTTON TO yes%

This will set yes% to zero if the mouse buttons are not swapped, and non-zero if they are swapped.