handle change history assignment block

Hi Experts,

    i need your help,

    i will explain the requirement,

    BSP Component : BT126H_CALL.

    I  have overage page  validate expertise ,In overage page contains general data assignment block

    In general  data assignment block  when i change status filed , the change history assignment block is updated.

    In same overview page  i add two new assignment block i need to  track data of new assignment block  In chage history assignment .

    Could please explain step by step how create new object and how to use the object in my component .

Thank and best regards

Brahmaiah