PMDG 737 - FS9 Course knob

[Luke Kolin]

I have some software that allows me to lookup a VOR and automatically apply the frequency to the NAV1 radio with a specified heading. This works fantastically, except on the FS9 PMDG. It appears that offset 0C4E is read only and doesn't update the gauge and then when I move the knob I get the old course. Using FS Controls 1026 and 1027 doesn't appear to update the gauge either.

Does anyone know what controls or offsets can adjust the course knob in the PMDG 737 MCP? I imagine a home cockpit builder must have needed to do this at some point in the past; I am stumped.

Please note that this is for FS9, and *NOT* FSX.

Cheers!

Luke