A Service Reference is the same as a Web Reference.
that is, you can add
an ASMX web service as a reference and it will generate your proxies/etc. just
like Add Web Reference did.
1) Right click References and click 'Add Service Reference'
2) In the Add
Service Reference dialog click Advanced
3) In the Advanced Dialog click 'Add
4) Continue as you normally would for an asmx web service.