Make Program Feel If Any Device / Usb Device Plugged Into Computer Or Unplugged

May 5, 2010

how can i make my program feel if any device or usb device plugged into the computer or unplugged.url...


Communications :: Close Serial Port After USB Device Unplugged?

Oct 1, 2009

There seems to be a lot of discussion around about handling exeptions when a USB serial port device gets unplugged. What I want to know is how can one re-attach to it once it is plugged back in. The problem is that if you unplug a USB serial port device the app doesn't know it has gone and remains convinced it is still open. I have to close the app completely before I can re-attach to the device. I need a way to force it to close/go away.

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Measure How Many Bytes Of Data Does A Device Sent To Computer Using Program?

Nov 25, 2009

ust want to ask if its possible for me to measure how many bytes of data does a device sent to my computer using

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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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Have Computer To Tell Usb Connected Device?

Feb 3, 2012

How to have the computer to tell the usb connected device what to do.

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Connect A Scanning Device To A Computer Using .net?

Jan 29, 2011

How can i connect a scanning device to a computer using .net? Code 128.

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Emulate Computer As A Keyboard USB Device

Apr 3, 2009

Anyone know how we can connect a USB cable to one of the ports on the computer and send keys to it and have that acted like it was a keyboard if the cable was connected to another computer? I'm sure the USB jump drive for example is like a mini-computer, so how do we do the same thing but with a computer? Is there any code in VB, .NET for this?

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Find The Operating System Of The Device (if It's A Computer)?

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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Sending Data To MIDI Device On Computer

Jul 1, 2009

I need some sample code for sending data to the MIDI device on the computer? I'm not quite sure what the hardware's address is though.

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Connect The EPP (Encrypted Pin Pad ) Device To Computer By Using Mscomm Control?

Mar 14, 2012

Currently, i am trying to connect the EPP (Encrypted Pin Pad ) device to my computer by using mscomm control. May i know what are the possibility problems may cause the DSRHolding does not return to "True"?

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Make A Device Manager?

Jun 19, 2011

Does anyone know where I could start in making a device manager?

All I need is a list of devices installed in a list box

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Develop Smart Device Using Program?

Jul 21, 2009

I dont know how 2 develop PDA system... using

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Modify A Program To Control A Usb Relay Device

Mar 30, 2010

We are trying to modify a program to control a usb relay device. Essentially what the program originally does is give you a series of check boxes that you check to make the relay fire. We tried to modify the code so that the box is checked after 5 seconds using a counter and an if statement. It works, but only partially, what happens is the check box shows a check, but the even that is normally triggered does not happen. [code]

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MC75 Using Symbol.imaging.device Libraries For Program?

Jan 7, 2010

I have a .net application running on a symbol mc75 (motorola) using the scanner. I am now trying to add functionality for the camera and I am running into issues.

To find the 'devices' you are supposed to use the library's 'available devices' function.

With the barcode it is symbol.barcode.devices.availabledevices and it returns two items (you can scan from the scanner or using the camera device) However, when I do the camera library it does not find any devices - symbol.imaging.devices.availabledevices returns 0

I can take a picture using the software on the mc75, so I know the functionality is there, I just can't figure out how to get to it programmatically..

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VS 2008 Program Autorun When Removable Device Is Connected?

May 18, 2010

I'm not sure if this would be this right place to post this, or even if I should go about trying to do it through my program itself or through the computer's settings on the final EXE file, but anyways, here goes.

I have a synchronization program that syncs my flashdrive to my home computer and (hopefully) my flashdrive to my personal folder on the school computers. What I think would be easiest, though, would be if the program was located on the flashdrive, and would simply "autorun" when I plug it in, instead of having 2 separate instances of the sync program running at school and at home.

Would it be easier (or possible) to code for that from within the program, or with the EXE file's settings?

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Write A Program To Automatically Detect And Identify A Particular Device?

Sep 24, 2009

I am trying to write a VB program to automatically detect and identify a particular device that will only communicate to my program when I have 2 or more devices plug into the USB port. One way of doing it that I can think of is to scan through the available port and do a write and read to identified the port. But that would take up a lot of time if I were to scan through say 5 available port.

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Create A Program In Program That Interfaced With An USB Device?

Feb 5, 2009

Anyone ever try and create a program in visual basic that interfaced with an USB device? For example say I want to build a clock but I want to have the software to control this through usb. I want to write the clock setting program that tells the clock what to set for time and date and things like that.

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Create Simple App Within Program To Send Timed Controls To External Device?

Mar 15, 2010

How can I create a simple application to send timed controls to an external device?

What I need is to create a very simple application that sends control signals or voltages out to an external device connected via serial perhaps. The external device will in turn trigger some electromechanical devices. There needs to be 24 independent controls each with a simple command equivalent to on or off.  What is important is being able to control the timings of the on and off on each control.[code]....

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Made A Small Program Displaying A String Value Coming From A Serial Device?

May 7, 2009

I have made a small program displaying a string value coming from a serial device. When I run this on my laptop, then everything is just fine (VISTA OS), but when I run the same program on another computer (XP OS), then it shows some strange chars (Squares in distance number).

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Pos Explorer - Open, Claim And Enable During Program Startup Then Use The Device On Certain Forms?

Apr 20, 2012

When using POS explorer, everytime I claim my receipt printer it takes a few seconds. My question is how can i claim the device at program startup then share the device between forms? Meaning I want to open, claim and enable during program startup then use the device on certain forms.

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Get Away From The Windows Form Look And Feel To More Of A 'game' Feel?

Jul 17, 2010

I'm wanting to make my UI like that of games such as the old Sim City (yes I have a sim application i've been working on)How can I get away from the windows form look and feel to more of a 'game' feel?WPF is one option, is there anything else?

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Get LAN Name (not Device Name)

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

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How To Run Device Via USB

Aug 2, 2009

I am using VB.NET. How can I run device via USB? I mean device, such as lamp by USB.

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Communicate With A PCI Device?

Apr 29, 2010

I`m working on a project where i have connected a FPGA chip to the PCI bus but now i am trying to figure out how to communicate in VB to that device? Normally the device has memory assigned to it in XP (address h00000200 to h0000037F) but i don`t know how to read/Write to that memory directly in VB...

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Determine Device IRQ In .Net

Mar 22, 2012

How do you retrive a given device IRQ in VB.Net? I can find no examples of this anywhere.

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How To Detect A USB Device

Oct 23, 2009

I need to detect a usb device when it is connected to PC.I found next code that is working. But it works only with Mass Storage.Imports System.Management

Public Class Form1
Private WithEvents m_MediaConnectWatcher As ManagementEventWatcher
Public USBDriveName As String


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One Device And Two Applications

Mar 15, 2010

Device : USB Scanner
Application : A
Application : B

Let's say there are two applications are running, which are A and B, on windows XP and they all have only one simple form with a text box to receive a data from the scanner. Is it possible to read a number by the scanner and write the number for those two text box on A and B at the same time?

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Test To See If Usb Device Is On?

Sep 17, 2009

How would a person test to see if a usb device is on?  I have a program with a usb reader attached to it and would like to throw an exception if it is not on.

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2005 - USB Device Recognition ?

Jun 11, 2008

I am trying to write a 'simple' program with vs 2005 that recognises my specific usb memory stick so that I can make windows log off or 'lock' when the device is not in any slot. I have found some ready code and I am trying to modify it for my needs. There compiling works but when it doesnt find any of the usb ports.It  works by checking each port if it is a usb port and then compares the vendor and produck ID to the given. it seems simple enough but I cant get it to find the USB.

Here is the code:

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Access A Device With Modbus In VB Or C#

May 5, 2010

I'm trying to access a device with modbus in VB or C#. I've been searching all over for a simple way to do it. I know that It would be connecting through a TCP Connection, and I know the address of the device. I need to read the input on it (whether of not it's on), and to toggle the relay on it as well.

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Access To USB Device Files?

May 27, 2009

I have spent couple of days searching the Internet for some hints, but I haven't succeeded. I need to enumerate all removeable USB storage devices and search for a file. It's important to say, I am looking for a device, which has no drive letter assigned - e.g. Garmin GPS etc.. how to enumerate the devices, indentify storage one and/or access its files?

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Access USB Device Files?

May 27, 2009

I have spent couple of days searching the Internet for some hints, but I haven't succeeded.I need to enumerate all removeable USB storage devices and search for a file. It's important to say, I am looking for a device, which has no drive letter assigned - e.g. Garmin GPS etc..

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Attach An USB To Any Device And Detach An USB?

Dec 31, 2010

I need to know, how can we attach an USB to any device and detach an USB. I'm using VB 2008 version. I need to write a code for usb detach and attach in windows xp. Whenever usb is detach from the PC side, i should get a message in command prompt saying that, USB is detached and if you insert an USB , then i should get a message saying that, usb attached. 

I'm struck which api should use to communicate with usb , to get info such that usb has been attached or detached? 

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Connect To A Device Through A USB Port

Nov 5, 2009

How do I connect to a device through a USB port. Saying I know what the device ID is. I want to open up serialized communication between me and the device.

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Data Input From A Usb Device?

Oct 17, 2011

I have a usb instrument and a driver who's printed output dumps a data string to the computer I need to be able to read this string into vba The driver manual provides the content of the string but no info on how to access the data.

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Datagridview As An Input Device

Apr 14, 2009

Is it possible to use a datgridview as an input device and then transfer the input to variables (one or two dimensional). I am creating a programme that can be used for a widely divergent number if inputs and the grid would be easier for the user rather than me creating a lot of text boxes at design time which may not be required much of the time and a datagridview would probably be preferable.

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Detect A Usb Device When It Is Connected To PC?

Feb 2, 2010

I need to detect a usb device when it is connected to PC.I found next code that is working. But it works only with Mass Storage.

Imports System.Management
Public Class Form1
Private WithEvents m_MediaConnectWatcher As ManagementEventWatcher
Public USBDriveName As String


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Detect If A Device Is Connected?

Sep 6, 2009

I am trying to figure out how to detect if a device is connected. The exact c# sample can be found here: [URL]

But when I tried to convert it to C# .... I wasted hours!

I googled a lot and changed the declaration of the API many times...

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Detect When A New Usb-device Is Connected?

Mar 27, 2009

I want to detect when a new usb-device (can be anything) is connected to the computer. I don't need to know what kind of device it is, I just want to know when it is plugged in.

I found this thread: [URL]

I know the solution is in here, but I'm overlooking it I'm afraid. What I want:

USB-device connected > Run function. USB-device disconnected > Run another function.

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Detecting Usb Device On Connect?

Aug 19, 2011

i'm kind of new to this. I'm using VB2008 and i need to write a code for recognizing a usb's details. like port number and letter and serial number if they have one. if i need to be more specific, then i have to say its for a machine that records data and i need to transfer that data over to my laptop through a gpib to usb cable. the cable has a specific "id" and i need to find that out and type it into the program interface that i'll make when i know how to detect that "id" so it can connect.i've read a few forum posts by others and they are really informative but not what i could use or i could not make it work.(yet)[URL]..and the other links posted there.for reading and helping. thats the clearest way i can explain. if anyone needs a more specific detail, just ask because i dont know if i left out anything else.

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Device Detects Movement?

Feb 26, 2011

Im working with my project. I have a device called PIR (Passive Infrared Resistor), capable of detecting any kinds of movement. When the device reached the maximum limit of movementthe red light will turn on. The output of my device is -5v. I want my program to respond when my device detects movement

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Get Custom Data From USB HID Device?

Aug 4, 2010

I've created a custom USB device using a PIC18F4550 and I'm having trouble with reading information from the device. The device sends reports without a request from the application as 64 bytes. I'm relatively new to VB and this is my first foray into USB as well... It's not going good. I've set the Vendor ID to Hex 1234 and the Hardware ID to Hex 0001. I've used different libraries and the timer to check for incoming reports, but I can't seem to figure it out. I've waded through pages of USB Complete and all kinds of code for mice and barcode scanners, but nothing so far that will do anything for my device.. how I can register the device and get the raw report from the device and display it in a text box

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Get Device Driver INF File API?

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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Get Devices Name From Device Manager?

Jan 24, 2012

I want to show a list of devices attach to system same like Device Manager tree.

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Get The Last Plug Date Of A Usb Device

Nov 4, 2010

I want to get the last plug date of a usb device, and view the tech article below [URL] But i did not understand the following sentence: "To determine when the device was last connected to the system, obtain the LastWrite time value from the respective Disk and Volume GUID Registry keys for the device."

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