SIOC Code for General Aviation Directional Gyro

Hello all
I am trying to make it work my MIP with rotary encoders connected to master board. I have already set VOR1, VOR2, ADF, and ALtimeter, but I can´t configure the directional gyro correction and heading bug. I found some examples about the heading bug, but nothing related to DG. I willlike to use the FSUIPC_INOUT function,so, If I modify the settings with mousein the panel, when I start to use rotary encoders again, starts with the last value. Any help?
Thnak you!
Fabrizio.