Trigger function when changing field value of custom table

Hallo,

we have a custom table which is changed by several programs or User exit's also manual in SM30. When a value of this table is changed the record shall be send to a subsystem.

My problem is how to trigger the interface. Can this be done by workflow event creating change documents with "SCDO - Overview" and SWEC ?

Does anybody can explain me the steps or another idea how to solve this problem ?

Thanks a lot in advance !

Volker