How to call a Workflow task in Portal

Hi Guys,
I am developing a workflow which has to display the task in UWL in Portal.
How to achieve this.
I can call PROCESS_DIALOG from WEBSERVICE BO.
But I am not sure, how the task is connected.
If its a ABAP-WebDynpro Application involved here, How to find out which WebDynpro application has been used.
Thanks
Senthil

Assign the Task to a WebDynpro Application in tcode SWFVISU.
Cheers

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