Start/End Routine to convert 0FISCPER to 0CALQUARTER

Hello,

I have a DSO that contains 0FISCPER but no references at all to any calendar dates. I am using fiscal variant K0 and have added 0CALQUARTER to the InfoProvider. I now need to write a start/end routine to transform 0FISCPER to 0CALQUARTER. I have never written an ABAP routine outside of the 2 introductory ABAP classes I took several months ago. Can someone give me an example of what the start/end routine code should look like to accomplish this?

Thanks.

Derrick