Create Attachments to Generic Object Services from Webdynpro appliccation

Hi,

I have requirement to Create Attachments to Generic Object Services(GOS) in equipment master (IE03) from webdynpro when a user clicks on upload button and also allow the user to delete the attachments .

Can anyone advice me of any Function Modules or logic to use from Web GUI.

I used below logic from R/3 to create attachments, but from webdynpro this method doesn't work.

DATA lo_attachment TYPE REF TO cl_gos_document_service.

CREATE OBJECT lo_attachment.

CALL METHOD lo_attachment->create_attachment

EXPORTING is_object = ls_object

IMPORTING ep_attachment = lp_attachment

Your inputs are appreciated.

Thanks

Rajesh Yalda