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 field , 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  block.

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

Thank and best regards

Brahmaiah