This function enables the user to create a binder surface and add it to the part C_BINDER.

Note:   If there is an existing C_BINDER part in the current database, eta/DYNAFORM creates a part named BINDER01.  Subsequently, if additional binders are created, BINDERn+1 will be created.  eta/DYNAFORM recognizes the binder created from the binder menu.