Need of an RFC for WF??

Experts,
Greetings!
I have a very fundamental question here.
In-spite of reading lot many articles around about WF,
I am still unable to understand the need of an RFC.
i) Why do we need RFC destination host configuration? What is its significance and usage?
ii) Also, would I still need the RFC Configuration if I am developing and executing WF in the same client - same box.?
Please explain.
Thanks!
DEV!

Hi
You can find all details about RFC in following link:
[http://help.sap.com/erp2005_ehp_04/helpdata/EN/22/042a3e488911d189490000e829fbbd/frameset.htm|http://help.sap.com/erp2005_ehp_04/helpdata/EN/22/042a3e488911d189490000e829fbbd/frameset.htm]
Kind regards
Edited by: Carlos Machado on Jun 12, 2010 11:00 PM

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Syntax
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Effect
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CALL FUNCTION - STARTING NEW TASK
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