DDJ, December 1995: Examining the Windows 95 Layered File System
by Mark Russinovich and Bryce Cogswell

Listing One

typedef struct DRP { 
       CHAR    DRP_eyecatch_str[8];     // eye catcher string
        ULONG   DRP_LGN;                // drivers load group
        PVOID   DRP_aer;                // pointer to async event outine
        PVOID   DRP_ilb;                // ILB virtual address
        CHAR    DRP_ascii_name[16];     // Name of the device       
        BYTE    DRP_revision;           // driver revision
        ULONG   DRP_feature_code;       // Feature Code 
        USHORT  DRP_if_requirements;    // I/F Requirements
        UCHAR   DRP_bus_type;           // type of I/O bus if port driver
        USHORT  DRP_reg_result;         // Registration Results
        ULONG   DRP_reference_data;     // field passed in on initialize
        UCHAR   DRP_reserved1[2];       // filler for alignment 
        ULONG   DRP_reserved2[1];       // reserved
} DRP, *PDRP;