[This is preliminary documentation and subject to change.]
The WinSNMP smiCNTR64 structure contains a 64-bit unsigned integer value. The structure represents a 64-bit counter.
typedef struct {
    smiUINT32   hipart;    // high-order 32 bits 
    smiUINT32   lopart;    // low-order 32 bits 
} smiCNTR64, *smiLPCNTR64; 
 
  Windows NT: Requires version 5.0 or later. Available as a redistributable for Windows NT 4.0.
  Windows: Unsupported.
  Windows CE: Unsupported.
  Header: Declared in winsnmp.h.
WinSNMP Manager API Overview, WinSNMP Structures, SnmpGetVb, smiVALUE