The DRS_COMP_ALG_TYPE enumeration is a concrete type for identifying a compression algorithm.

 typedef  enum 
 {
   DRS_COMP_ALG_NONE = 0,
   DRS_COMP_ALG_UNUSED = 1,
   DRS_COMP_ALG_MSZIP = 2,
   DRS_COMP_ALG_WIN2K3 = 3
 } DRS_COMP_ALG_TYPE;

DRS_COMP_ALG_NONE:  No compression.

DRS_COMP_ALG_UNUSED:  Unused. MUST not be used.

DRS_COMP_ALG_MSZIP:  MSZIP algorithm.

DRS_COMP_ALG_WIN2K3:  Windows Server 2003 operating system compression.