Thanks a lot ppl.. It helps..

Thanks for all the comment. i know that it is bad to use checkforillegalcrossthreadcalls = false but this is really the last resort as i still cant understand multi-threading. Next, port.read(bytearray, 0, bytetoread), it is bytearray and a few line above should be Dim bytearray as byte.. Sorry for the typo error. Noted for the encoding.ASCII.getstring. thanks for the advise. For the 2nd last line i don't get u.. Care to explain??

No Clue !! , it does not seem that any threading is used in the code you pasted , i am really not able to think of any other cause of problem :( -Regards Bharat Jain bharat.jain.nagpur@gmail.com

Sorry for being so noob. Thanks anyway i got my command line to my hardware already. But the question now is i was unable to see the reply. How can i get the reply to be posted at a list box? Which means i need to display the reply from the port to list box.

Well, there's nothing to add a reference to since the SerialPort class is in System.dll. I have no idea what you're doing wrong. It should be as simple as: Imports System.Io.Ports Public Class MyForm ... Private ComPort As SerialPort = New SerialPort A guide to posting questions on CodeProject[^] Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic      2006, 2007, 2008

A command line is not the same as a console. A command line is a string that is sent to the application when it starts. If you start an application from a console window, you type the command line after the application name, but if you start the application another way you specify the command line in some other way. If you for example start the application by dropping a file on the application file in the explorer, the command line will be the path of the dropped file. Despite everything, the person most likely to be fooling you next is yourself.

It is the same amount of code i posted earlier. Those in the PRE tags are those code whereby i think my mistake is at. As for the serverRespone.Length, 2 is not the intended length but i already change it but it seen like there is not much different. The reply i got are all rubbish.

Sorry Can't help you, I don't have the time to audit your code right now. Debug it and you'll find the error.

So i would like to ask if u have any example of tcplistener and tcpclient both as stand alone application to pass me? As i can only find file that combine them together online. I need to test them out on 2 seperate pc before i can progress in my project. Thanks for the help.

I don't intend to do a web application. Is window application ok for communicating between computers?

hi, You can surely find many online tips for writing the code..i am telling this becoz i am also working exactly with the same what you are expecting..My advice is, try yourself by searching in google so that you will get more ideas. Regards... Selva Shankar

No, not really! :-D A guide to posting questions on CodeProject[^] Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic      2006, 2007, 2008

could also use "if my.Computer.FileSystem.FileExists(strFilePath) then". I have found the IO.File method to perform better if checking a large amount of files though. Any suggestions, ideas, or 'constructive criticism' are always welcome. "There's no such thing as a stupid question, only stupid people." - Mr. Garrison

You don't need a Timer to go for that long. You just set it to fire once a second, then, once per minute, you can compare the current time to a "scheduled" time for a process to kick off. It's utterly pointless to have a timer going for any entire day. What if your app DOES crash, or the machine goes down or loses power?? How are you going to reset the timer to a proper schedule?? That's why you have it check against a known time, instead of a known interval. As for the size of the RTB, you really need to make sure you save off the log information to a file instead of relying on the RTB to hold onto it for you, for the very same reasons I just mentioned above. Cna you think of anything worse than losing half a days data because you didn't save each piece to a file when you received it? A guide to posting questions on CodeProject[^] Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic      2006, 2007, 2008

Dave Kreskowiak wrote: I spewed Coke out my nose Thanks for the mental picture :laugh: Dave Kreskowiak wrote: onto my (work) laptop. Please, don't tell anyone! Oooooooooooooooooh, busted :laugh: Ummm, I didn't see or read anything, boss. I swear :-D "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon "Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

You're looking for the SerialPort class, here[^]. A guide to posting questions on CodeProject[^] Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic      2006, 2007, 2008

Hi there I don´t know exactly if you want this, but you can capture the event of the class with 2 ways: First: The declaration of the class is not in a function, it´s a global var. You can declare it like that: Private WithEvents Client as ClientClass And then you can set the handler of the event in a function, like that: Private sub OnClientLogin (sender as object, e as eventArgs) handles Client.Login Or you can set hte handler in the code: Private sub SetClientEvents() ..... addHandler Client.Login, addressof OnClientLogin ..... end sub Second: If you have a class declared in the method, you can use addhandler Private sub AddClient() ... dim Client as ClientClass ... addhandler Client.Login, addressof OnClientLogin ... end sub -------------- I think that is it what you want. ----- LeandroAB

Use a property Dim strVar As String = "la la la" Public Property SharedMyVariableWithTheWorld() As String Get Return strVar End Get Set(ByVal value As String) strVar = value End Set End Property Any suggestions, ideas, or 'constructive criticism' are always welcome.

The TcpListener object merely listens for connection requests. When a connection request comes in, you can either use that as a trigger (Which I have done for some purposes), or you can issue an AcceptTcpClient to create a TcpClient object for transmitting information back and forth. Additionally, the TcpListener object does not have events and you "should" have it configured as a listener thread that simply loops and checks for connection requests. I don't claim to be a know it all, for I know that I am not... I usually have an answer though.

Start a project in VB, and add the component: MScomm Control. Copy the icon of a telephone onto a form, then write some code to enable the COM port like: MSComm1.Settings = "9600,n,8,1" MSComm1.ParityReplace = "" On Error GoTo COMerr MSComm1.PortOpen = True Exit sub COMerr: msgbox "A COM error occured:" & err.number & vbcrlf & err.description End Sub To send data out the COM port use: MSComm1.Output = "This text string will go out the COM port." To trap received data on the serial port, you must add this to the MScomm1.OnComm event: dim TCin as string if MSComm1.CommEvent = MSCOMM_EV_RECEIVE then TCin = MSComm1.Input msgbox Received: " & TCin end if You should also include these in a declarations file: '--- MSComm event constants Global Const MSCOMM_EV_SEND = 1 Global Const MSCOMM_EV_RECEIVE = 2 Global Const MSCOMM_EV_CTS = 3 Global Const MSCOMM_EV_DSR = 4 Global Const MSCOMM_EV_CD = 5 Global Const MSCOMM_EV_RING = 6 Global Const MSCOMM_EV_EOF = 7 '--- MSComm error code constants Global Const MSCOMM_ER_BREAK = 1001 Global Const MSCOMM_ER_CTSTO = 1002 Global Const MSCOMM_ER_DSRTO = 1003 Global Const MSCOMM_ER_FRAME = 1004 Global Const MSCOMM_ER_OVERRUN = 1006 Global Const MSCOMM_ER_CDTO = 1007 Global Const MSCOMM_ER_RXOVER = 1008 Global Const MSCOMM_ER_RXPARITY = 1009 Global Const MSCOMM_ER_TXFULL = 1010