public_name - The name under which the member will be
exposed by the composite. This will be the name of the member in the
obj - Object from which the member will be exposed
InnerNameOrID - The name or DISPID of the member in the obj.
flags - Optional, the allowed method behaviors:
&H01 - Property Put
&H02 - Property Get
&H04 - Method
Default is 7 (all allowed)
ReqID - Optional. If not omitted specifies the DISPID for
the member. If not the ID will be selected automatically.
return value: The reference ID of the member. The member
can be referred further using its name or this ID (which will be