Editing ABAP workbench objects without developer key

Need to edit an ABAP Workbench Object in a system where you do not have a Developer Key? Do not despair! Set a...

break-point on statement "when 1." in function module "DEVELOPER_KEY_CHECK", restart your maintenance transaction, and edit your object. Press cancel, should the "Add Developer" screen pop up. Now, replace the value of SY-SUBRC with 0 and press continue. As the Developer Key is verified at several stages in every maintenance transaction, you will have to repeat these last two steps. Not that a blank Developer Key will be stored in table "DEVACCESS" along with your user-id.