Declaration: NewSection(ParentPath, SectionName: String): String;
Adds a new section to a digitized type item and returns the full path to the new section.
If ParentPath does not exist, or is not a digitzer item, this function fails and returns an empty string.
SectionName is optional.
result := NewSection(itempath, 'Name is Optional'); // this is not a digitizer object, will return ''.