Available encoding formats for Data Matrix. 
- Enumerator: 
 
| eAztecFm_Default  | 
 =0: Default mode : The standard format of Data Matrix without a special header.  
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| eAztecFm_UCCEAN  | 
 =1: UCC/EAN/GS1 mode : Special format defined by UCC and EAN/GS1 for encoding Application Identifiers. This format adds the function character FNC1 at 1st position in the symbol.  
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| eAztecFm_Industry  | 
 =2: Industry mode: supports peculiar industry formats (adds FNC1 at 2nd position)  
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