Create a new DOFValue to hold a single value of type Fixed-Encoding String. 
- Resource Management:
 - This function allocates resources that must later be freed by calling DOFValue_Destroy.
 
- Parameters
 - 
  
    | encoding | The MIBenum value, a unique value identifying a specific coded character set used by val. This should be > 2. Values can be found at http://www.iana.org/assignments/character-sets. Example: DOFVALUESTRING_US_ASCII.  | 
    | strLength | The number of characters in val (used only for type compatibility). This should be <= PCRString_Length(val). This may be 0 to disable string length checking for this value.  | 
    | val | The Fixed-Encoding String value to be held by the new DOFValue. This must not be NULL if strLength > 0. If not NULL, the string must be NULL-terminated. | 
  
   
- Returns
 - The new DOFValue, representing a single value of type Fixed-Encoding String.
 
- Exceptions
 - 
  
    | NULL | is returned if the resulting DOFValue could not be created, or an invalid parameter was detected.  |