How to use low level active laser drive？

Guoss

I tried this change, but the D11 output was high at the laser work
#define SUPPORT_LASER 1

#define LASER_PIN 11

#define LASER_ON_HIGH 0

RAyWB

invert the Signal by changing to :

#define LASER_ON_HIGH 1

be shure the Pin is not used for anything else, that won´t work.