How to read a Header Attachment in Item component ??

Dear Experts,
My Scenario is as follows :
1. In quotation Overview page ( BT115QH_SLSQ/SQHOverView ), I have an assisngment block call 'Attachments'. User can create URL attachment here. It is Std. Attachment ( component GS_CM , view Doclist ) Assignment Block and no enhancements are done for it.
2. The quotation overview page also have an items view ( BT115QIT_SLSQ/Items ) .
My requirement is in some eventhandler in view BT115QIT_SLSQ/Items , i want to read an attachment of the header , ie. say 1st row content of what gets displayed under Attchment Assignment Block for that quotation.
How can i get around this ?
Is it possible to read header attachment in item component ? how to do that ?
Any guidence or suggestions are highly appreciated !!
Thanks & Regards,
Suchita

Hi Carsten,
I tried using Custom Conroller, but i always got the entity on CMBO as initial in my event handle as it was getting called before CREAT_CMBO of custom controller was called.
But it was very good suggestion and i got to learn many things about custom controller as i had never worked much on custom controller related coding.
However, my issue got resolved with CL_CRM_BSP_CM_CONTROL class , method get_documents.
Once again thanks...thanks a lot for the prompt help you gave.
Thanks & Regards,
Suchita
P.S. : in component BT115QIT_SLSQ i created custom controller and related coding as you suggested, In the same compoent BT115QIT_SLSQ, i also have a view ZZ___ ,& in its DO_init_context, i called custom contoller using
lr_cuco ?= get_custom_controller( ).
and then i did
lr_entity = lr_cuco->typed_context->CMBO->collection_wrapper->get-current( ).
here i always got lr_entity as initial.
On debugging, i found that everything was gettting executed properly in ON_NEW_FOCUS method of CMBO, but still the collection was with 1 entity with empty attribut_ref in ON_NEW_FOCUS. and hence lr_entity used to be inital. The instid, typeid were had correct values taken from focus_bo ( which is btadminh instance) , stilll entity_list in collection was with 1 empty entity. I expected here values in attr_ref of the entity in enity_list but there were no values for the properties in structure Attribut_ref.
I did not understand this.
Also, after Do_init_context of my view ZZ___, the break point used to halt at CREATE_CMBO( ) statement. I tried with Do_prepare_output , but same stroty again, the breakpoint halted at create_cmbo() , after do_prepare_output was called.
Any idea why would be such behaviour ?

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