Supported bearer bar types. 
Enumerations for all supported bearer bar types 
- Enumerator: 
 - 
| eBearerBar_None  | 
=0: No bearer bar.  | 
| eBearerBar_TopAndBottom  | 
=1: Bearer Bar is drawn on top and bottom of the bar code.  | 
| eBearerBar_Rectangle  | 
=2: Bearer Bar is drawn on all sides of the bar code.  | 
| eBearerBar_Top  | 
=3: Bearer Bar is drawn on the upper side of the bar code.  | 
| eBearerBar_Bottom  | 
=4: Bearer Bar is drawn on the bottom side of the bar code.  |