Hi Faisal,
I am not sure but you can try with Global data context or Global custom contoller.
TRY.
* Create an instance of the data context.
lr_gdc ?= cl_crm_ui_data_context_srv=>get_instance( ).
IF lr_gdc IS BOUND.
* Get the Business Transaction entity
lr_current_bt = lr_gdc->get_entity( if_iccmp_global_data_cont_con=>gdc_currentservicerequest ).
* Get the Business Transaction GUID
ls_guid = lr_current_bt->get_property_as_string( 'CRM_GUID' ).
l_obj_guid = ls_guid.
ENDIF.
CATCH cx_root.
ENDTRY.
Regards,
Sumeet