A foreach-iterator for iterating over the items in the tree.
The items are passed in a ascending order of priority (lowest priority first followed by higher priority).
Parmas: dg = the foreach delegate
If dg returns a nonzero value then the method return that value, returns zero otherwise
See Implementation
A foreach-iterator for iterating over the items in the tree.
The items are passed in a ascending order of priority (lowest priority first followed by higher priority).
Parmas: dg = the foreach delegate