www.pudn.com > voltage_monitor.rar > myport.h

 
#define PORTTALK_TYPE 40001 
#define IOCTL_READ_PORT_UCHAR \ 
    CTL_CODE(PORTTALK_TYPE, 0x904, METHOD_BUFFERED, FILE_ANY_ACCESS) 
 
#define IOCTL_WRITE_PORT_UCHAR \ 
    CTL_CODE(PORTTALK_TYPE, 0x905, METHOD_BUFFERED, FILE_ANY_ACCESS) 
 
#define IOCTL_GETINTCODE_PORT_UCHAR \ 
    CTL_CODE(PORTTALK_TYPE, 0x906, METHOD_BUFFERED, FILE_ANY_ACCESS) 
 
unsigned char OpenPortTalk(void); 
void ClosePortTalk(void); 
void outportb(unsigned short PortAddress, unsigned char byte); 
unsigned char inportb(unsigned short PortAddress);portb(unsigned short PortAddress);