void serialportsetup(){
hCom = CreateFile( "COM1",
    GENERIC_READ | GENERIC_WRITE,
    0,    // exclusive access 
    NULL, // no security attributes 
    OPEN_EXISTING,
    FILE_FLAG_OVERLAPPED,
    NULL
    );

if (hCom == INVALID_HANDLE_VALUE){
  MessageBox(hEdit, "The COM port cannot be openned !", "Error!", MB_OK | MB_ICONEXCLAMATION);
}

bSuccess = GetCommState(hCom, &dcb);
if (!bSuccess) {
    MessageBox(hEdit, "Cannot read the COM port state !", "Error!", MB_OK | MB_ICONEXCLAMATION);
}

dcb.BaudRate = 57600;
dcb.ByteSize = 8;
dcb.Parity = NOPARITY;
dcb.StopBits = ONESTOPBIT;
dcb.fRtsControl=RTS_CONTROL_DISABLE;
dcb.fOutX=FALSE; 

bSuccess = SetCommState(hCom, &dcb);
if (!bSuccess){
    MessageBox(hEdit, "The COM port cannot be configured !", "Error!", MB_OK | MB_ICONEXCLAMATION);
}

bSuccess = SetCommMask(hCom, EV_CTS );
if (!bSuccess){
     MessageBox(hEdit, "The CTS pin state cannot be changed !", "Error!", MB_OK | MB_ICONEXCLAMATION);  
}
    o.hEvent = CreateEvent(  NULL,TRUE,FALSE,NULL);

    assert(o.hEvent);


}
Send(UINT command1, UINT sendlength){

       char command=(char)command1;
     if(black_bkgd) command=command | 0x20;
     ResetEvent(o.hEvent); 
    dcb.fRtsControl=RTS_CONTROL_ENABLE;
      SetCommState(hCom, &dcb);
    MessageBox(hEdit, "Send request !", "Warning !", MB_OK | MB_ICONEXCLAMATION);
    if (WaitCommEvent(hCom, &dwEvtMask, &o)) ;
       {
        if (dwEvtMask & EV_CTS){ 
   	      MessageBox(hEdit, "CTS received !", "Warning !", MB_OK | MB_ICONEXCLAMATION);
           dcb.fRtsControl=RTS_CONTROL_DISABLE;
	    SetCommState(hCom, &dcb);
	    bSuccess=WriteFile(hCom,&command,1,NULL,&b);
 	    if (!bSuccess) {
    	 MessageBox(hEdit, "Cannot write data to the COM  port!", "Error!", MB_OK | MB_ICONEXCLAMATION); wrong check...not important,anyway
         }
         if(mode!=5) WriteFile(hCom,sendbuffer,sendlength,NULL,&b);
	     else{
		      i=0;
		      Sleep(500);
		      do{
			     for(j=0;j<16;j++,i++ ){
                 WriteFile(hCom,&sendbuffer[i],1,NULL,&b);	
			     }
		         Sleep(40);
              }while(i<4096);
	        }
        Sleep(100);
        MessageBox(hEdit, "Message sent !", "Warning !", MB_OK | MB_ICONEXCLAMATION);
      }
   }
}