Unable to copy multiline text file to a buffer

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C

Windows

programming

file

text

I am trying to copy a text file to a buffer in order to send it over the socket. As soon as the text file does not have any newlines (or \n), the file is successfully copied into buffer. But, whenever there are multiple lines in a text file, I get an error, "Unable to copy file into buffer".

Below is the code snippet:

//=====================Sending a File at Socket=========================
   FILE *fp = fopen("File.txt", "r+");
   char file_buffer[1000];
   fseek(fp, 0, SEEK_SET);
   int bytes_read=0;
   if((bytes_read=fread(file_buffer, 1, file_size, fp))<=0)
     {
       MessageBox( NULL,
               "Unable to copy file into buffer",
               "Error!",
               MB_ICONEXCLAMATION |
               MB_OK);
      exit(1);
     }
     MessageBox( NULL,
             file_buffer,
            "File copied in Buffer",
            MB_ICONEXCLAMATION |
            MB_OK);

NOTE: The code works perfectly fine if the text file contains no new lines.