Urgent: POWL Question

Hi Guys,

    I have some doubts in POWL Report.

1.  How we can change the Header Name of the Fieldcatcalog instead of creating the new DATA element.

2. What is the use E_FIELDCAT_CHANGED exporting parameter in Method GET_FIELD_CATALOG. When we use that field.

3. What is the use E_ACTIONS_CHANGED in GET_ACTIONS.

What is the meaning of  this.

e_object_def ?= cl_abap_tabledescr=>describe_by_data( me->mt_result ).

Regards.

Nishant Bansal