Hi Buddy,
First of all to understand the various objects which are required to be recorded for change pointer documents generation.
As and Example ,take SKA1/SKB1 tables which are designed to hold the GL Master information and key field is SAKNR. When the correspoding dataelemetn is clicked, a new window is openend which has a Check box duly checked at the bottom left corner. If this check box is enabled, System keeps an eys over these objects and generates the Change Document as and when this data changes in SAP repository.
This enabled for Master data (GL,VENDOR, CUSTOMER etc.,) and Transaction data(PO,FI DOC, SD etc.,).
Now, for a system to generate the document and have an entry into repository, the corresponding MESSAGE type should be enabled for changes recording locally apart from global enabling of changes recording.
As far as Proecss is concerned, for MM,SD,FICO etc modules the change document tables are CDHDR adn CDPOS HR module the tables are PCDHDR and PCDPOS.
First move to CDHDR and supply the Object (like KNKK for customers data whose credit limit data has been changed) , CHANge indicator (U/D etc.,)and collect the change number
and pass this change number to CDPOS and get the table, field, old value and new value.
Incase if the above is still not clear, do mail me with your problem statement at my ID : srinivasvk9211@yahoo.com
thanks,
kumar