Alright today im going to make a chat program in C++ and VB.net VB.net will be the server and C++ will be the chat room. Im doing this becuase some people dont have .net and the program fails so im trying this so then everyone can use it. How would i do this? Like C++ sending information to VB.net and printing it out on a textbox
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I have a Delphi program that communicates with a vb.net dll that I created. The vb.net dll communicates with a Fluke scope meter via an RS232 connection. I have created a program that communicates correctly via RS232, giving me the anticipated value. Though, when I package this up as a dll and access the dll from my Delphi program I always receive a value of "1", rather than the value I was expecting (most cases a value in and around 240).I know that my delphi program is definitely communicating correctly with the dll and that my dll is definitely communicating with the scope meter
Here is my vb.net code:
Public Interface IFlukeComm
Function GetReading(ByVal Command As String, ByVal PortNum As Integer) As String
[code].....
I have an application which the user can open multiple instances on the same machine. However, a section of the app would have sync problems if more than 1 instance has control over it. This is where I thought of transferring control, or sharing, between them. What should I be looking into?
They would have to be able to identify which one of them has control and to send text information over. I thought IPC or Named Pipes could do the trick, but I'm unfamiliar with them and examples seem to indicate only a single server will work. Here, I have multiple instances of the same app and every one of them needs to be able to listen for that request for control.
I'm currently working on a project which includes a web application and a windows application. Here's what I want to do:
I want to pop up a msgbox or something similiar on the windows application whenever a user makes an entry into a certain table in the database on the web application. It's going to be like msn messenger's new e-mail notification. All I could think of so far is checking the database for new entries every second or every a few seconds from the windows app. but I think this might add an extra load on the cpu and the internet connection of the client computer.
I'm going to create an application that will act as some sort of task manager. For stability reasons I will not use threads but processes instead. I have to deal with several third party libraries and/of COM servers that are not always that stable and can produce severe crashes sometimes. This may (of course) not affect the task manager
Problem with using processes is how to communicate with them? The process must f.e. give a status back of what it's doing every x seconds.
I was thinking of using TCP over a separate port per process, but is this the best way of doing this?
Iam using GetKeyboardState API in my application for getting keyboard state . it was working fine for win32 applicati9on. When I moved to 64 bit application gets crahes without popping any exception message.my sample code is as given below:
Private Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Integer, ByVal dwExtraInfo As Integer)
Private Declare Function GetKeyboardState Lib "user32" (ByRef pbKeyState As Byte) As Integer
[code].....
I am using Microsoft Visual Basic 2008 Express Edition on an Acer Aspire 3810T running 64bit Windows Vista Home Premium (Intel GMA 4500). No matter what Code I write concerning DirectX, I get a White Form with a huge Red X when I run the PROGRAM. I also get the error: not a valid Win32 Application. This is the last Code I used:
[Code]...
Well this question is related to use of Win32 API. I am trying to get text of a RichTextBox which is located in one of my text application. I am trying to use EM_GETTEXTEX message to collect the data.
[Code]...
I have an application that starts one of two external CAD applications depending upon the extension of a file in a ListView. I have been able to start up the application to view the file selected without a problem. I also have a seperate print click event for printing the file that opens the viewer application in the background and prints the file. This works perfectly for one of the CAD viewers but when I select a file that requires the other viewer application to print I get a Win32 exception and an error message stating that the file is not associated with any application and it cannot be opened. This of course is rediculous as it opens fine in the "View File" click event that opens the viewer to check the drawing.
One rather strange observation is that the CAD viewer that does print the associated file will launch the other CAD viewer application (that is associated with the other file extensions) when the "View" click event is handled even though I had not incuded the code to execute the process to start the viewer for that type of file. I realize this rather convoluted and may lie in the ProcessStartInfo arguments that I pass to the application.
Here's a code snippet:
Private Sub PrintFinGoods_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles PrintFinGoods.Click
Dim message As String = "No application is associated with file"
Dim source_exception As New Exception
[code]....
I have a form in my VB>NET project (2010) with some ImageList. Those images are embedded in the list with a form resource in a .resx file asdata name="xxxx.ImageStream" mimetype="application/x-microsoft.net.object.binary.base64When I tried to build/run my project I get:
View 1 RepliesI was scripting a very basic process manager, with a ListView component, and it was working fine for many days, up until now.Here is the code for getting processes:
Dim Process As New Process()
Dim Count As Integer = 0
ListView1.Items.Clear()[code].....
The line of code where I put "*WIN32 EXCEPTION LINE* keeps running into an error(Win32 Exception was unhandled; Access is denied). Here is the full error description:
System.ComponentModel.Win32Exception was unhandled
ErrorCode=-2147467259
Message=Access is denied[code]....
As I said before, this had been working for several days, up until now.
I'm using the SDK that my laptop's touchpad manufacturer, Synaptics, provides in order to extend the touchpad's functionality. In the SDK, there's a file named SynCtrl.dll, which contains a few ActiveX controls.Based on what I learned from the samples provided in the SDK (which are VB 5 old and don't compile), I wrote this little application:
[Code]...
I saw in a youtube video to get SQLserver 2005 management tool express, But I can't install it, I get an error saying "This is an invalid Win32 Application", Also, Do I need like a web hosting server? Or any kind of server?
View 14 RepliesI have inherited a VB.NET project which was created in VS 2003 and is now in VS 2010. It works fine on one macine (32 bit). However, on my Win7 64 bit machine it simply won't build or run. I get an error saying "xxx is not a valid Win32 application. (Exception from HRESULT: 0x800700C1) Line 4762, position 5"
[Code]...
I want to code an app with recreational purposes. This should be a Desktop app that detects itself running on other computers on the same LAN and communicates with them. By communication I mean that I should be able to pass anything from on to another. note that although I'm not asking for code (that would beat my purpose, of course) I think some small snippets wouldn't hurt. In any case what I really want is the "recommended procedure", I mean what Microsoft recommends for this environment, and documentation :)
View 3 Repliesis there a way through vb visual express 08 to ask a printer if it has toner or paper? im not to sure on how to communicate with printers in this way if it is at all possible.i am writing a program to display the status of the printer and this is key.
View 1 RepliesI've set up this function in my web app to send push notifications to Android devices:
Private Function SendNotification(ByVal authstring As String) As String
Dim request As WebRequest = WebRequest.Create("https://android.apis.google.com/c2dm/send")
request.Method = "POST"
[code]....
However, whenever I call this function, I get the following error message: The remote certificate is invalid according to the validation procedure."
I have VB.net Simple application with form1.vb , UserControl1.vb and a simple Dataset with few records included. In my UserControl1.vb I'll added a Bound DataGridView1 with Products Datasource. My question is.. How can i filter the Products table from UserControl1.vb? The Filter Value ("ProdID") is from Form1.vb with textbox1(receive the value.). here is my Form1 code
[Code]...
Im new to using databases in my programming and to be honeest i am struggling.i need to get the program to communicate with my database to allow the user to login this is the code i have so far as i say i dont know much about it so its a bit bodged.
[Code]...
I need to communicate between multiple applications (one server and multiple clients) in the LAN. While googling I came across 3 concepts (TCP/IP, Named Pipes and WCF). I also understand WCF needs lot of study for a starter like me. I need to have one (server) application running on one machine, the values generated by it should be displayed immediately on the other (client) application which will be running on multiple machines in a LAN. Also when the user pauses the process from the client application, it should pause the process on the server application.
View 2 RepliesI am communicating to a device using a USB to serial port (VCP). I am having a problem with the usb failing. When the usb fails my app will lock up and the com port is lost. I have seen a post about this but cannot find it.
View 3 RepliesI've been trying for a long time to do what seems to be the most simplest of things..I have a remote host and I need to know if certain posts on that host are open or closed.Many examples on the net that I have found arent complete, and because I havent worked with VB.net for long I dont knowhow to complete them.Here is my code:: The issue is with this it tell me the target port is always closed, when I know that it is open.Code:Dim host As String = "www.google.com" Dim port As Integer = 80 Dim addr As IPAddress =CType(Dns.GetHostAddresses(host)(0), IPAddress) Try Dim tcpList As New TcpListener(addr, port)tcpList.Start() Catch sx As SocketException MessageBox.Show("port is closed") End TryA friend of mine suggested using WinSock.. I've not dealt with it before so I don't know what he's on about.
View 2 RepliesI have a project in VB .net 2008 and would like to communicate with a Sharepoint site on our companies SP server. Is it possible to interact with the SP site such as:
Create sub-folder
Upload and download files
Change authority levels on folders
I am basically after some information on what you would believe to be the best way to send strings from a mobile device (possibly a windows mobile phone) to a PC and vise versa. Just so you know the distance could be upto 4 miles and no direct line of sight.
View 6 RepliesI have created a windows service that monitors power events on the host machine. The next step that i wanted to do was to send custom messages to the service. To do this i have created a windows application and added a service controller control to it (drugged it from the toolbox). Initially i tried to send messages to my machine which worked fine (both the service controller and the service were running on the same machine)
Dim scSL As New System.ServiceProcess.ServiceController("MyFirstService", ".")
scSL.ExecuteCommand(128)
but when i tried to send a message to a remote machine on the network
Dim scSL As New System.ServiceProcess.ServiceController("MyFirstService", "machine001")
scSL.ExecuteCommand(128) i got the following error:
"System.InvalidOperationException: Cannot open Service Control Manager on computer 'machine001'. This operation might require other priviledges. ---> System.ComponentModel.Win32Exception: Access is denied.
Anyone knows what priviledges i need to set on the machine that has the service controller? Alternatively can anyone recommend a solution to this issue?
I am building a client-server type applications and they are communicating over sockets. This is the first time I am doing such a program and I have been learning off a web example and thought I understood it all but it would appear I am missing something as it starts to work then errors. Here is what I have:
VB
Dim serverSocket As New TcpListener(ListeningPort)
Dim clientSocket As TcpClient
Dim netStream As NetworkStream
Dim BytesFrom(1024) As Byte
Dim DataFromClient As String
[Code] .....
All of the above works and if I open up a telnet command window I can connect to my machine running this code on my specified port and in the command prompt window 'IDENTIFY' appears as it should from the above code. But it then gets to this block an errors on the second line:
VB
'RECEIVE FROM CLIENT
netStream = clientSocket.GetStream()
netStream.Read(BytesFrom, 0, CInt(clientSocket.ReceiveBufferSize))
DataFromClient = System.Text.Encoding.ASCII.GetString(BytesFrom)
Now as far as I can tell it shouldn't be processing the first line
[ netStream = clientSocket.GetStream() ]
Until I send something back from the client because then going on to the second line its trying to process something that isn't there yet.
The actual error I get is:
Specified argument was out of the range of valid values. Parameter name: size
On the line:
netStream.Read(BytesFrom, 0, CInt(clientSocket.ReceiveBufferSize))
I have a need to be able to communicate with a VB6 application (I have the source code) whilst it is running. I just need to get it to display some predefined forms. Any tips on how I could achieve it. I was thinking along the lines of using Sockets.
View 1 RepliesI need to interface between a PC and a Microcontroller based Controller to transfer data between the PC and the Controller?
Ive got acces to the register numbers or names in the Microcontroller.
I am attempting to communicate with set of scales with a vb application that i have written using the comm control. The scales are a Kelba KHX-30 I can read the data from the scales but i have to manually press a button on the scale.
View 4 RepliesWe have a web app in a web browser running on an intranet so security is less of an issue. We have a separate win form app. Is there any way the Win Form app could call javascript in the web browser. The browser can't be embedded in the WinForm.
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