Function module for Change document for Business partner

Hi Experts,

Could any one send me the sample code of function module for CDHDR and CDPOS tables for extracting the change date along with role.

Eg :

BPRole Changd on crtd by crtd on Business partner

ZCASH 30.11.2011 NHALLAL 24.11.2011 0001000237

CRM000 03.12.2011 NHALLAL 24.11.2011 0001000237

I wanted to catch up the changed date and changed role from CDHDR (base table) and CDPOS(cluster table - item level).

Might be involved with creation of extract structure.

Any sample codes are appreciated. Thanks.

Regards,

Janardhan