Fm to convert XSTRING TO STRING in SRM 7.0

HI All ,

            i have created a web dynpro application for Uploading excel . Now i am not getting any workaround to convert X STRING to STRING . In SAP there is a FM HR_KR_XSTRING_TO_STRING but its not there in SRM so when i tried to copy the same in SRM and try to convert its getting converted in Junk characters . Please help me out in this .

Regards

Shankar