Need to determine first item on Services tab - COMMPR01

Hello:

We are maintaining service items corresponding to material items in Transaction COMMPR01. Service items are accessed by clicking on the Relationships button for a particular material, and then on the Services tab.

Our requirement is to determine the first service material maintained on the Services page, based on a given material (Material GUID-Service GUID relationship can be obtained in table COMM_IL_SERVI). Can someone please point me in the right direction to achieve this functionality?

Thanks!

-John