Mouse esquerdo
@echo off
reg add “HKCU\Control Panel\Mouse” /v SwapMouseButtons /t REG_SZ /d 0 /f
RUNDLL32.EXE user32.dll,SwapMouseButton 0

Mouse Direto

@echo off
reg add “HKCU\Control Panel\Mouse” /v SwapMouseButtons /t REG_SZ /d 1 /f
RUNDLL32.EXE user32.dll,SwapMouseButton 1