Hi i tried same code it's work for me it's wok please double checok u registrated dll in ur enumaltor Thank you Cheers,Earn and Enjoy RRave MCTS,MCPD http://ravesoft.blogspot.com

If you are using C# private void Form1_Closing(object sender, EventArgs e) { e.Cancel = true; }

Thanks a lot :) My problem is solved..

Never mind, I found out :) Thanks for a fast and great answer :)

haolan wrote: Private Sub Command1_Click() Dim CheckSum As Byte, x, Tid MSComm1.Settings = "1200,N,8,1" Buffer = "GET" + vbCr CheckAndSum Buffer ' add Checksum and Length of string Buffer = Buffer + SumStr 'For x = 1 To Len(Buffer) ' Tid = Timer ' Do ' DoEvents ' Loop Until (Timer - Tid > 0.01) ' MSComm1.Output = Mid(Buffer, x, 1) 'Next x MSComm1.Output = Buffer End Sub A few questions... Which serial port? How do you know this does not work? Where is code to listen for the result your program is expecting? What is the specification of the device that needs this input? Maybe the port parameters do not match up?

Ok.. I found this example at MSDN: public static void Read() { while (_continue) { try { string message = _serialPort.ReadLine(); Console.WriteLine(message); } catch (TimeoutException) { } } } And then you say I have to create a method that tries to parse the code, to check if it is a valid message, and if not, then it should run the read() again until the code can be parsed right?

Developing Orientation and dpi Aware Applications for the .NET Compact Framework [^] cheers, AR

Not as far as I know. If you don't want to use the standard ASPNETDB.mdf database that resides in the App_Data to store membership info, I believe this tool is your only option. Paul Marfleet "No, his mind is not for rent To any God or government" Tom Sawyer - Rush