Hi Chris,
Actually, an external DW can be used to perform updates and has buffers just like any other. The column types in the DWO have to match up with the columns in a database table, and you have to manually specify the Update Properties.
Mariano,
To get info from the Delete! buffer, use GetItemNumber(), GetItemString(), or dot notation.
e.g.
ll_val = dw_external.GetItemNumber(1, "name", Delete!, FALSE)
or
ll_val = dw_external.object.name.delete.current[1]