www.pudn.com > windows2000XP_WDM_DeviceDriverDevelopment_WuAnHe_C > CharSampleioctl.h
// CharSampleioctl.h
//
// Define control codes for CharSample driver
//
#ifndef __CharSampleioctl__h_
#define __CharSampleioctl__h_
#define CHARSAMPLE_IOCTL_800 CTL_CODE(FILE_DEVICE_UNKNOWN, 0x800, METHOD_BUFFERED, FILE_ANY_ACCESS)
#endif