(Test script)

function OnEvent(event, arg)
    if event == "PROFILE_ACTIVATED" then
        EnablePrimaryMouseButtonEvents(true)
    elseif event == "MOUSE_BUTTON_PRESSED" and arg == 1 then
        if IsKeyLockOn("numlock") and IsMouseButtonPressed(3) then
            PlayMacro("DPI Down")
            _LOW_DPI = true
        end
    elseif event == "MOUSE_BUTTON_RELEASED" and arg == 1 then
        if _LOW_DPI then
            PlayMacro("DPI Up")
            _LOW_DPI = nil
        end
    end
end