//Global Variables
	 
  	
HANDLE hComm = NULL;
COMMTIMEOUTS ctmoNew = {0}, ctmoOld;
DCB dcbCommPort;
char InBuff[100];
char *a="COM1";
	 
  	
//Open the COM port
	 
  	

hComm = CreateFile(a,GENERIC_READ | GENERIC_WRITE,0,0,OPEN_EXISTING,0,0);
if(hComm == INVALID_HANDLE_VALUE){
....// IF the COM port can not be opened
}

// SET THE COMM TIMEOUTS.

GetCommTimeouts(hComm,&ctmoOld);
ctmoNew.ReadTotalTimeoutConstant = 100;
ctmoNew.ReadTotalTimeoutMultiplier = 0;
ctmoNew.WriteTotalTimeoutMultiplier = 0;
ctmoNew.WriteTotalTimeoutConstant = 0;
SetCommTimeouts(hComm, &ctmoNew);

// SET BAUD RATE, PARITY, WORD SIZE, AND STOP BITS.
// THERE ARE OTHER WAYS OF DOING SETTING THESE BUT THIS IS THE EASIEST.

dcbCommPort.DCBlength = sizeof(DCB);
GetCommState(hComm, &dcbCommPort);
BuildCommDCB("14400,N,8,1", &dcbCommPort);
SetCommState(hComm, &dcbCommPort);
	 
  	
//Send commands to COM port
	 
  	

TransmitCommChar(hComm, '0');
TransmitCommChar(hComm, '1');
TransmitCommChar(hComm, '+');
TransmitCommChar(hComm, '/');
TransmitCommChar(hComm, '/');


TransmitCommChar(hComm, 'x');
TransmitCommChar(hComm, 146);
TransmitCommChar(hComm, 60);
TransmitCommChar(hComm, '/');
TransmitCommChar(hComm, '/');
	 
  	
//Read the COM port
	 
  	

ReadFile(hComm, InBuff, 50, &dwBytesRead, NULL); //InBuff contains the COM received bytes
	 
  	
//Close safety the COM port
	 
  	
// IF A PORT WAS OPENED, CLOSE IT
if(hComm) {
Sleep(250); // WAIT FOR THREAD TO FINISH
SetCommTimeouts(hComm, &ctmoOld);
CloseHandle(hComm); }