www.pudn.com > inpout32.zip > hwinterfacedrv.h

 
 
#define IOCTL_READ_PORT_UCHAR	 -1673519100 //CTL_CODE(40000, 0x801, METHOD_BUFFERED, FILE_ANY_ACCESS) 
 
#define IOCTL_WRITE_PORT_UCHAR	 -1673519096 //CTL_CODE(40000, 0x802, METHOD_BUFFERED, FILE_ANY_ACCESS)