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Sending IOCTLs to Windows NT Drivers

By Paula Tomlinson, February 01, 1997


February 1997/Sending IOCTLs to Windows NT Drivers/Listing 1

Listing 1: wdj.h — Defining an IOCTL command

//
// Microsoft uses 0 - 0x7FFF, OEMs use 0x8000 - 0xFFFF
//
#define FILE_DEVICE_WDJDRV  0x00009500

//
// Microsoft uses function codes 0-0x7FF, OEM's use 0x800 - 0xFFF
//
#define WDJ_IOCTL_INDEX  0x950

#define IOCTL_WDJ_REQUEST   CTL_CODE(FILE_DEVICE_WDJDRV,  \
                                     WDJ_IOCTL_INDEX,     \
                                     METHOD_BUFFERED,     \
                                     FILE_ANY_ACCESS)

/* End of File */


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