Lost with "Trees" how to???

Hi guys!
My goal is to rebuild something like psv2 (business event menue) in web dynpro.
But I'm really getting lost with "trees" there. Actually i have no idea how to start and handle trees.
I can't have a look at the WDR_TEST_EVENTS because this services are somehow disabled in our environment,
Does someone have some good Tutorials (step by step) how to work with trees?
regards thomas

I couldn't find any step-by-step tutorials on the subject. Although you may have already found it, the online help link has a decent amount of details:
http://help.sap.com/saphelp_nw70/helpdata/EN/21/ad884118aa1709e10000000a155106/frameset.htm
Also even if you can't run the sample application (probably just because the service node is deactivated - you can go to SICF and activate it), you can still study the source code.
Do you think that you will be needing a very dynamic tree structure (in which case you would model a recursive node context) or do you know the tree structure at design time (in which case you simply model that structure in the context)?

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Lost with "Trees" how to???

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