using swfvisu to call webdynpro application

Hi,

my requirement is to call webdyn pro application from workflow.

i have seen some forums to call webdyn pro application using SWFVISU.

1. if we call webdynpro application using SWFVISU do we need uwl development or not ?

2. what are the parameters that we need to pass to SWFVISU to call webdynpro application ?

3. if we give task id in SWFVISU . will webdynpro application called when we execute that method or  will it create any hyper link in task.

4. i tried to display webdyn pro appliction url in user decision step .but when i click on that it is showing error "No internet connection" in workflow window only .do we need any settings required to execute that url   ?

Thanks,

phani.