BAPI_BUPA_ADDRESS_ADD FM for add address

hi exports,

I'm using .net web service for create a vendor in sap,

i used VENDOR_INSERT FM , it's successfully created.

so then i go to xk03(t-code) to view the vendor by vendor code it show the error

Error analysis

    The system attempted to use

    This dynpro does not exist.

problem is addr is not found in lfa1

so i user BAPI_BUPA_ADDRESS_ADD FM for add address details.

then

CALL FUNCTION 'BAPI_BUPA_ADDRESS_CHANGE' "SAP BP, BAPI: Change Address

  EXPORTING

  businesspartner = " bapibus1006_head-bpartner Business Partner Number

* addressdata = " bapibus1006_address Address Data

what is businesspartner ID means. what value i have to pass to create the address ????