Can I fetch value of a characteristic in a macro script?

Hi,

I have a characteristic called 'Distribution Channel' (DC) in my DP workbench which can take value '10' and '20'. I need to write a macro which behaves differently for DC=10 and 20. I know I can create two mass processing jobs with required selection profile (which will take care of  DC). However I need to run it as 'Default Macro'. How do I fetch the value of "Distribution Channel" dynamically inside my macro script?