Implemented a program in c for fifo..pls help

I have implemented below program in c.
While debugging its giving error on Open, Read commands as "identifier "open" not defined" and
Error 5 error LNK2019: unresolved external symbol _mkfifo referenced in function _main
Error 6 error LNK1120: 1 unresolved externals
Please help asap.. 😔

#include<errno.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<stdio.h>
#include<Windows.h>
#define FIFO "/root/test/test"

int    mkfifo( char *,int mode_t);

int main(int argc, char** argv)
{
    char buf_r[100];
    int fd;
    int nread;
    if((mkfifo(FIFO, O_CREAT) < 0) && (errno != EEXIST))
    {
            printf("can not create FIFO\n");
            exit(1);
    }

    printf("Prepare read data\n");
    fd = Open(FIFO, O_RDONLY);
    if(fd == -1)
    {
            exit(1);
    }

    while(1)
    {
            if((nread = Read(fd, buf_r, 100)) == -1)
            {
                    if(errno == EAGAIN) printf("No data\n");
            }

            if(buf_r[0]=='Q') break;

            buf_r[nread]=0;
            printf("data is：%s\n", buf_r);
            Sleep(1);
    }

}