Walk through treeview. How?

[coolcurrent4u]

Hello guys,

am writing code that walks through treeview. i am trying to move through the treeview i.e.

when i click next it moves from parent to child if in parent, another next moves to next child, another next to next child, if at the end of the child, it moves to next parent until the end. please see the attached picture

but cant figure it out.


any help