Werner,

On C++ under WindowsCE.NET it looks like this

bool initComms(void)
{
DCB dcb;
COMMTIMEOUTS ct;
if(hCommPort==INVALID_HANDLE_VALUE)
hCommPort=CreateFile (_T"COM1:"),GENERIC_READ|GENERIC_WRITE,
0,NULL,OPEN_EXISTING,0,NULL);
if(hCommPort==INVALID_HANDLE_VALUE) return FALSE;

dcb.DCBlength=sizeof(dcb);
GetCommState(hCommPort,&dcb);
dcb.BaudRate=9600;
dcb.fOutxCtsFlow=FALSE;
dcb.fRtsControl=TRUE;
dcb.fDtrControl=DTR_CONTROL_ENABLE;
dcb.fOutxDsrFlow=FALSE;
dcb.fOutX=FALSE;
dcb.fInX=FALSE;
dcb.ByteSize=8;
dcb.Parity=NOPARITY;
dcb.StopBits=ONESTOPBIT;
SetCommState(hCommPort,&dcb);
..............................
return true;
}

After initialisation you can use

EscapeCommFunction(hCommPort,SETRTS);
EscapeCommFunction(hCommPort,CLRRTS);
EscapeCommFunction(hCommPort,SETDTR);
EscapeCommFunction(hCommPort,CLRDTR);

Hope it helps a little. I did not check but I guess that you can write similar programme under W2K.

Regards,
George