typedef struct _DUMP_STACK_CONTEXT
{
     DUMP_INITIALIZATION_CONTEXT Init;
     LARGE_INTEGER PartitionOffset;
     PVOID DumpPointers;
     ULONG PointersLength;
     WORD * ModulePrefix;
     LIST_ENTRY DriverList;
     STRING InitMsg;
     STRING ProgMsg;
     STRING DoneMsg;
     PVOID FileObject;
     DEVICE_USAGE_NOTIFICATION_TYPE UsageType;
} DUMP_STACK_CONTEXT, *PDUMP_STACK_CONTEXT;

Windows Vista Kernel Structures