Returns or sets a String indicating which macro, event procedure, or user-defined function runs when the CommandBeforeExecute event occurs. Read/write.
Valid values for this property are "macroname" where macroname is the name of macro, "[Event Procedure]" which indicates the event procedure associated with the CommandBeforeExecute event for the specified object, or "=functionname()" where functionname is the name of a user-defined function. For a more detailed discussion of event properties, see "Event Properties."