How to use EPCF eventing in Webdynpro

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Hi All,

I have made a Webdynpro application as an iview in portal. Now i need to accomplish client eventing between this iview and any other portal iview. I learned from this link

http://help.sap.com/saphelp_nw04/helpdata/en/d8/6ee03fc2269615e10000000a155106/frameset.htm

that, this can be done through EPCF.

I can very well write use the EPCM objects in EP components with the help of Javascript tags.

But, I learned from my Webdynpro friends and these links

javascript-in-webdynpro-application

javascript

how-to-make-use-of-javascript-functionality-in-wd-

that, Webdynpro is strictly NOT the place for Javascript.

So, Where and How to use EPCF APIs in Webdynpro?

Shortly, In an Webdynpro application, where and how can i insert the following line of code.

WDPortalEventing.subscribe("urn:com.sap.tc.webdynpro.test.portal","TestEvent",wdThis.wdGetTestEventAction());

Please help me in this regard..

Vijay.K