Windows Cannot Load The Device Driver For This Hardware Because There Is A Duplicate Device Already Running In The System (Code 42)
Nov 13, 2009
A Problem in accessing a device from VB Windows cannot load the device driver for this hardware because there is a duplicate device already running in the system. (Code 42) This error is because i am using 2 devices of the same company which has the mass usb storage on it and when i install one of the device the other hides. So one is detected the Other is not. It also give a error called designed dragnonacally something...
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Mar 11, 2012
I seem to recall that there is an API which will return the INF file associated with a device driver but I'm drawing a blank. I want to get the path to the INF File, File Name Section Name and File Date.
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Mar 16, 2012
Is there an API which will tell you the start code for a device/device driver?
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Mar 8, 2012
I am developing a software that will monitor/poll serveral Modbus/TCP devices on a network.
I have managed to connect to one device using VB.Does anyone know of a driver or perhaps a 3rd party software I could use that will enable me to connect to more than one Modbus/TCP device?
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Jan 9, 2011
how to get current volume of system sound device in windows 7 ?I looked up in google but every solution returned values like -1, 4686346, ...
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Jun 29, 2010
I want to add full GPS support into my application. The .Net 4.0 System.Device.Location namespace information here is perfect for my needs. When this was first announced and the Beta release was out, I got a GPS dongle, but I could never get Windows 7 to see it as a sensor and therefore make use of System.Device.Location. After many e-mails to Microsoft they would only confirm that they were using the GPS dongle that comes with a M$ Mapping product..
Does anyone know of any other Dongles that definately will appear as a sensor in Win7? I like the look of this one, it gets good reviews and is a nice size.Is there anyway of knowing that it will work, for example what Chipsets are supported as a Windows 7 Sensor, a lot of the information out there says that the Win7 implementation is really lacking..
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Sep 28, 2011
I am writing a class library that envelopes an USB device driver. This device has its own class library, provided by the hardware vendor.
Very often, especially if you handle with old DLL or COM assemblies, there are methods (functions to be correct) that return TRUE if all was OK, or FALSE if any error happen. Often these methods return information about the error in one of their parameters or separately in a GetLastError method or even if in an OnError event.
Now, normally I handle all native .NET exceptions in my class libray handling locally or re-throwing to the client if the error is useful to know. But what to do with all other errors that are hidden in the vendor's methods? (in the true I have no exceptions, but only returned TRUE or FALSE values).
Let's make an example with the method "CONNECT" that connect the client to the USB device.
I envelope the method in this way:
Public Sub Connect()
oVendorDevice.connect()
End Sub
now if any connection error happen, the vendor's connect method return FALSE. But I do not know why the connection failed. To know why the connection failed I have to call (for example) the method GetLastError that gives me information about the error. (but do not forget that other vendors use other strategies like returning the error in a method's parameter or in a OnError events.
Now, in order to follow a good .NET exception handling strategy I could write something like this:
Public Sub Connect()
Dim res As Boolean = oVendorDevice.connect()
If res = False Then
[Code].....
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May 5, 2010
how can i make my program feel if any device or usb device plugged into the computer or unplugged.url...
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Oct 14, 2009
I have an application that I am running on a Panasonic H1 handheld device, that is used at remote locations. I have a database on this device (SQL Server 2005) to help with the data entry process. Because the H1 can be slow (only 2GB ram), when this application starts, I load the data into a global data set. As this data is loading I display a progress bar letting the user know what's going on. This works quite well.
On my main form, the user has the ability to enter data into a text box, and press a button that will open up another form. The data that was entered into the first form's text box will be displayed in the second form's text box with a datagridview below showing results that matched what was typed in. Also, the user does not have to enter any data in the first form's text box, just hit the search button, and all records of the table will be displayed in the second form's datagridview. Then as they start entering data in the second form's text box, any data in the table matching what is entered is displayed.
This is how I am binding the data in the second form's datagridview :
objBS = New BindingSource
objBS.DataSource = g_objDS.Tables("nsi")
dgvSampleID.DataSource = objBS
Now, in the search form, let's say I type '27190' into the text box, only 3 records exist in the SQL Server table therefore only these 3 records will be displayed in my datagridview :
27190-001
27190-002
27190-003
The code to perform this 'auto complete' is in the TextChanged for the text field :objBS.Filter = "sample_id like '" + Me.txtSampleID.Text + "%'"Now, when a I double-click one of the rows, the form closes and the first form then has several fields filled in based on the row selected. When I clear out the text box in the first form, then press the search button, I am expecting to see the entire database in the second form's datagridview. However, what I am seeing is the 3 rows from above.
When I run the app in debug mode, I verify that the 'g_objDS.Tables("nsi")' does in fact have all the records in the table I want to search. Yet when I assign the objBS.datasource = g_objDS.Tables("nsi"), objBS.count = 3, representing the 3 records from above. My question is why am I not seeing the entire database.
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Sep 10, 2009
Is there any way to disable a system device from VB.NET. Such as a device that needs to be enabled/disabled quickly and or uninstalled.
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Aug 11, 2009
I have 1problem...i want to connect device and then the device can display the output in mysystem design.the system is for display value output in decimal.so,how to create code for the projek?and than the device use port usb...how to connect device with my system?
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Oct 12, 2011
I am developing an application that reads from a network shared folder on a separate Windows Server. When the application attempts to read, I am receiving the error message "System.IO.IOException: The Device Is Not Ready". I have tried running the application as an Administrator, however I still receive the same error.The files in question do not appear to be in use by any other application.
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Jan 26, 2012
I am building a simple network browser that pings a specified range of IP addresses, and if a response is discovered, it gets the host name and MAC address of the device it pinged.My first question is how can I find the operating system of the device (if it's a computer)?My second question is, for devices that aren't computers e.g. a wireless printer or router, is there a way I can find out what type of device it is?
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Oct 23, 2010
i am using the below code in VB.Net to load the available serial ports :
COMsComboBox.Items.Clear()
Dim i As Integer
For i = 1 To My.Computer.Ports.SerialPortNames.Count
COMsComboBox.Items.Add(My.Computer.Ports.SerialPor tNames(i - 1))
Next
i also want to load their names as seen in the "device manager",
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Aug 23, 2009
I'm trying to move a windows form app to a windows mobile 5 device and I was able to get every thing working except this piece of code.
[Code]...
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Apr 29, 2010
I want to develop an application in VB.net for handheld device(Ticket machine in Bus and train).Is it possible to develop in Vb net. Whether i need windows OS in my handheld device or any runtime environment only needed.My hardware is ARM processor.I want to run my application as standalone in my machine.
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Dec 31, 2011
hi, i am writing vb 2010 (VS 2010) application for making bootable pendrive. For this, i want to format USb drive, but i cant find any suitable way. I found the use of SHFormatdrive() function, but is there any suitable way..?
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Feb 16, 2012
how to use a webcam to take a photo on a Windows Forms application,Now what I need, is to identify which device I'm using to take the photo, in case I ever happen to have two or more similar devices connected to the machine.Currently our setup involves an Asus EEE PC deployed at our location. The machine has an in-built webcam which we are using in the application as described above.Somewhere within this code below, the default device is being identified and selected for taking the pictures we need.
Imports System.Runtime.InteropServices
Public Class Form1
Const WM_CAP As Short = &H400S
[code]....
Now what I need is to find the code that does this identification, and then hardcode the device identity into that code so that if I ever attach another (USB) webcam to the machine in future, it does not inadvertently take a photo from the wrong webcam.
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May 23, 2011
I am using visual studio 2008 professional.i am trying to deploy a simple hello world application to a hand held device.
i currently have the device connected via usb, i can run the app through vb and it deploys and runs on the device however i don't know how to create the install and install it on the device so it can run independent.
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Jan 2, 2010
Hours of trawling the net and the closest I have come is to some C# examples.Does anyone know how I would be able to detect an ActiveSync connection in VB.NET for a a Windows XP app? What I want to do is get my app to detect a connection and check for a few files on the device, offering to transfer/ process them if available.
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Jun 10, 2011
I have put the file under the path below. How to access this file from VB.Net on Desktop program??
My Devicexxxx folderfile.sdf
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Nov 25, 2011
Im new to programming.I work for a research in Sri Lanka.In our research data is collected on windows mobile devices.I am the person who connects the devices(Known as JUNOs) and copy the data to the hard drive.But when Im not around others should copy the data.But they havent got IT knowledge.I want to create a simple software which detects the JUNOs when connected,show a message that a device is connected(Ex : JUNO1 is now connected),and then a button to copy and paste data to hard disk.(Ex: Press copy button to copy data)
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Oct 26, 2009
The MSDN documentation for WMPLIB states that syncing to device is not supported in .NET programming, only C++.Is there, however, a simple wrapper class or DLL that can be used to interface between a .NET program and the nescessary C++ code?Or is there a better way to sync files to a device using VB.NET? Are all devices suited/compatible with just a simple filesystem.copyfile ?
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Feb 18, 2011
I am working in visual studio 2010, framework 3.0.I want to enumerate the Audio Recording devices on Vista and Windows 7 PCs. With the help of Core Audio APIs, this is completed successfully. Now I want to change the default state of devices and also I want to set the state of Disabled device to Enable. In Core Audio APIs, it is not possible. So can I use the Registry to Enable the device or change any device to DEFAULT?On changing the default device from SOUND dialog, windows makes some changes of Binary values in registry Role:0, Role:1,ole:2under HKLMSoftwareMicrosoftWindowsCurrentVersionMMDevicesAudioCapture {GUID}.
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Nov 21, 2010
I am working on Some USB reader device..i got only delphi 7.0 example code...i can able to understand some code remaining cant so below is that code.
function ReadCard(fUSB:Byte;Buffer:PChar):Integer; stdcall;
external 'proRFL.DLL';
function GetDLLVersion(sDllVer:PChar):Integer; stdcall;
external 'proRFL.DLL';
[CODE]...
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Apr 24, 2012
I'm doing a project with vb.net (smart device) on visual studio 2008 and I need to connect to a database on the device itself (I do not have a physical device to test, only emulation). How should I go about doing it? I would like the database to be in the device on start up.
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Jul 25, 2011
I have a Windows form.in windows form have a combo box that give me a list of available port serial with it code (Dim ports As String() =SerialPort.GetPortNames())for example( Com1,Com8,Com15,...).but I want to give me fullname of serial port in device manager for example in dvice manager is these (Comunication Port(COM1) - Printer Port(LPT1) And USB Serial Port(COM8)).how to Get it?
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Feb 16, 2011
I'm trying to make a simple fruit machine game for windows mobile device.
I can create the game easily enough and flip through pictures in a picture box to display the correct symbol.. but what I'd like to do is do a proper spinning reel, but have no idea where to even start.
What I have is a list of images in an imagelist (or individual files) - what I'd like is them attached to each other and moving downwards, preferably as though it were going around a drum but just them moving would be a start.
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Sep 25, 2011
I am building a Setup project for a Web system using Visual Studio 2008. I upgraded my development machine from Windows Xp to Windows 7. The problem started with Windows 7. Whenever I try to build I get the above error. I ve tried several solutions given online but I ve failed to get a solution. When I transfer the system to a machine running Windows Xp or Windows 2003 Server it builds successfuly.
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Jun 21, 2011
I can get the LAN Device Names (using code below) but how do you get those strings from the "Name" column (see image) that the user can change?
' get list of enabled lan card device names
Dim cat As New PerformanceCounterCategory("Network Interface")
Dim instances As String() = cat.GetInstanceNames()
For Each instance As String In instances
Debug.WriteLine(instance)
Next
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