I have a project that references a web service.  How do I change which
web service it references when I move from dev to qat to production?

I have been changing path to the web service in dev to point to my qat
service, building the project and coping it to qat.  Then changing the
path back for dev.  Then doing the same thing to get to production
from qat.  I must be missing something her????

Thanks