Hi Christoph,
Thanks for your interest in Syncfusion products.
We have attached the sample application here.It illustrates that " How does one walk through TreeViewAdv". Simply it will display a message box to notify which item has been selected.You can do your operations when TreeViewItemAdv is selected.
We hope it would satisfy your needs.
Please let us know if you have any queries.
Regards,
David C
TreeViewSample_a62dc818.zip