What`s the Problem with this Serial comunication

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Windows

Win32

Arduino

serial-port

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Hello Everybody,

I am doing a college work. I have to make a programm that receives serial data from a Arduino and plots it, i am using the win32 api. I am having a problem in receiving this data. It just writes randon numbers.


Here is the program:

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#include <string.h>
#define MAX 100


int main()
{
  
  
   DCB dcb;
   HANDLE hCom;
   BOOL fSuccess;

   char pcCommPort[50] = "COM4";

   hCom = CreateFile( pcCommPort,
                    GENERIC_READ | GENERIC_WRITE,
                    0,    // must be opened with exclusive-access
                    NULL, // no security attributes
                    OPEN_EXISTING, // must use OPEN_EXISTING
                    0,    // not overlapped I/O
                    NULL  // hTemplate must be NULL for comm devices
                    );

   if (hCom == INVALID_HANDLE_VALUE)
   {
       // Handle the error.
       //printf ("CreateFile failed with error %lu.\n", GetLastError());
       return (1);
   }

   // Build on the current configuration, and skip setting the size
   // of the input and output buffers with SetupComm.

   fSuccess = GetCommState(hCom, &dcb);

   if (!fSuccess)
   {
      // Handle the error.
      return (2);
   }

  

   dcb.BaudRate = CBR_9600;     // set the baud rate
   dcb.ByteSize = 8;             // data size, xmit, and rcv
   dcb.Parity = ODDPARITY;        // no parity bit
   dcb.StopBits = ONESTOPBIT;    // one stop bit

   fSuccess = SetCommState(hCom, &dcb);

   if (!fSuccess)
   {
      // Handle the error.

      return (3);
   }
pcCommPort);

 

long int x=0;
int tx;
DWORD num;
char in[1000];
    tx = ReadFile(hCom,&in,strlen(in),&num,NULL);
    if (tx == TRUE) {
          //  printf("SUCCESSFULL READ\n");
            }
        else{
            //printf("UNSUCCESSFULL READ");
        }

    //printf("NUMBER OF BYTES READ: \t%d\n",&num);
    for (x=0;x<1000;x++){
    printf("num = %d\n",in[x]);
    }

    CloseHandle(hCom);

return 0;
    }

Can anybody help me?