Moves the iterator to point to the next element in the collection.
Using an iterator is faster than using an index when accessing collection
If the iterator is pointing to the last element of the collection prior to
executing this function, then calling this method will make the EOC property
return TRUE. Also, the iterator will not be changed. The EOC property should be
checked when calling this method repetitively.
You need to call the IterNext method after you call the InitIteratormethod or else the first element in the collection will be repeated an extra
See also IterPrev and InitIterator.
Example: Collection Iterator