WebMethods

hi to all
What is WebMethods? and How to Start Learning this? can any one help me out?

do we have any tools for developing WebMethods? How Usefull it is?

Please clear all my doubts.

What is WebMethods?
and How to Start Learning this?can any one help me out?How Usefull it is?
do we have any tools for developing WebMethods?
Please clear all my doubts.