SAP ABAP Table T100U (Last person to change messages) is used by

• Class (10)
• Function Module (17)
• Program (42)
• Table (1)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Class	CL_ADT_MC_RES_CONTROLLER Method: DO_GET	T100 Message class resource controller	SMESSAGE_ADT	BASIS	SAP_BASIS
2	Class	CL_ADT_MESSAGE_CLASS_API	T100 Message class APIs for CRUD	SMESSAGE_ADT	BASIS	SAP_BASIS
3	Class	CL_ADT_MESSAGE_CLASS_API Method: READ_SELFEXP	T100 Message class APIs for CRUD	SMESSAGE_ADT	BASIS	SAP_BASIS
4	Class	CL_ADT_MESSAGE_CLASS_API Method: UPDATE_SELF_DEF	T100 Message class APIs for CRUD	SMESSAGE_ADT	BASIS	SAP_BASIS
5	Class	CL_ADT_MESSAGE_CLASS_API Method: CREATE	T100 Message class APIs for CRUD	SMESSAGE_ADT	BASIS	SAP_BASIS
6	Class	CL_ADT_MESSAGE_CLASS_API Method: UPDATE_MESSAGE	T100 Message class APIs for CRUD	SMESSAGE_ADT	BASIS	SAP_BASIS
7	Class	CL_CRM_OBJECT_ATTRIBUTE Method: IF_CRM_CHECK_RESULT_VALID~CHECK_VALIDITY_OF_CHECK_RESULT	Check Results Management: Object Attributes	S_CHECK_RESULT_MANAGEMENT	BASIS	SAP_BASIS
8	Class	CL_DPR_MAINFRAME_UTIL Method: MESSAGE_IS_SELFEXPLANATORY	Help Functions for Back-End Communication	DEVELOPMENT_PROJECTS_UI_LOGIC	PROJECT_PORTFOLIO_MANAGEMENT	CPRXRPM
9	Class	CL_DPR_UI_SERVICES Method: MESSAGE_IS_SELFEXPLANATORY	Service Class for UI	DEVELOPMENT_PROJECTS_UI_LOGIC	PROJECT_PORTFOLIO_MANAGEMENT	CPRXRPM
10	Class	CL_WDR_MESSAGE_AREA	Internal Interface for Message Area	SWDP_RUNTIME_COMP	SAP_UI_ROOT	SAP_UI