hCom = CreateFile("COM2",
      GENERIC_READ | GENERIC_WRITE,
      0,    /* comm devices must be opened w/exclusive-access */
      NULL, /* no security attrs */
      OPEN_EXISTING, /* comm devices must use OPEN_EXISTING */
      0,    /* not overlapped I/O */
      NULL  /* hTemplate must be NULL for comm devices */
      );

  if (hCom == INVALID_HANDLE_VALUE) 
  {
     dwError = GetLastError();

     /* handle error */
     printf("Mist! nicht geoeffnet\n");
}

fSuccess = GetCommState(hCom, &dcb);

if (!fSuccess) {
    /* Handle the error. */
    printf("Mist! kein Status\n");
}