General directions
* Create a custom class in your description.ext.
* Set a value of some sort within the class.
* Try to fetch the value with getMissionConfigValue.
Specific example
* Add the attached description.ext to a mission.
* Go ingame and type the following in the debug console:
---
hint format["Value: %1", getMissionConfigValue "CfgAutodoor" >> "Vehicles" >> "Land_Airport_side_base_F" >> "doorList"];
---
* Observe as it displays something like this in the hint dialog:
---
Value: 02558CB8
---