C Program to Send Data to USB Port

#include<stdio.h>
#include<conio.h>
#include<windows.h>
#include<io.h>
#include<stdlib.h>
HANDLE GetSerialPort(char *);
void delay();
int main(void)
{
 do
 {
    HANDLE h1, h2;
    char h1_buffer[] = ("Hello World:");
    char h2_buffer[24];
    DWORD byteswritten = 0, bytesread = 0;
    char c1[] = {"COM14"};
    char c2[] = {"COM14"};
    h1 = GetSerialPort(c1);
    h2 = GetSerialPort(c2);
   
    WriteFile(h1, h1_buffer, 17, &byteswritten, NULL);
    ReadFile(h2, h2_buffer, strlen(h1_buffer) + 1, &bytesread, NULL);
   
    if (bytesread)
    {
       printf("%s\n", h2_buffer);
    }
    else
    {    printf("Nothing read\n");  
    }
    CloseHandle(h1);
    CloseHandle(h2);
    delay();
    //getch();
  }while(1);     
}
HANDLE GetSerialPort(char *prt)
{
    HANDLE hSerial;
    hSerial = CreateFile(prt, GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
    DCB dcbSerialParams = {0};
    dcbSerialParams.DCBlength=sizeof(dcbSerialParams);
    dcbSerialParams.BaudRate=CBR_19200;
    dcbSerialParams.ByteSize=8;
    dcbSerialParams.StopBits=ONESTOPBIT;
    dcbSerialParams.Parity=NOPARITY;
    SetCommState(hSerial, &dcbSerialParams);
    return hSerial;
}
void delay ()
{
   int i = 1000000000;
   printf("In delay\n");
   while(i>0)
   {
      i--;
   }
}