struct DBGKD_WRITE_MEMORY32

typedef struct _DBGKD_WRITE_MEMORY32
{
     ULONG TargetBaseAddress;
     ULONG TransferCount;
     ULONG ActualBytesWritten;
} DBGKD_WRITE_MEMORY32, *PDBGKD_WRITE_MEMORY32;

Windows Vista Kernel Structures