A foreach-iterator for iterating over the items in the tree.
The items are passed in a descending order of priority (highest priority first followed by lower 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 descending order of priority (highest priority first followed by lower priority).
Parmas: dg = the foreach delegate