WMI Event Watcher - Detect A New USB Device
Mar 7, 2010
I'm trying to detect the insertion of a USB-Serial COM port device. I found an example that shows how to detect a new USB device - and that part is now working well in my project. The question is, how do I pass on that event back to my Form1 class? In the example, I can create a MsgBox just fine, but if I try to manipulate any of the controls on my form, or raise a user-defined event, I get this message: 'System.InvalidOperationException' occurred in System.Windows.Forms.dll
[Code]...
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Apr 6, 2011
I want to write a simple program, which should inform me before any files getting open (like as User account control in Windows Vista or Windows 7). I came to know that all antiviruses use this technique to detect viruses before they are affecting the system. My program must ask me as "Are you allow this file to run?" and allow it if I allow otherwise terminate the file.
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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
[code].....
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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
[code]....
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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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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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Jul 20, 2009
I posted the message below in the VB6 section of this forum with no success, but as I've now got access to VB2008 via work, I thought I'd try again here. Basically I'd like to be able in code navigate to a folder held on a mobile device like a mobile phone connected to a pc using MS Activesync? It shows up in the drive list within "My Computer" as a system folder, I've vb6 code to detect all the drives including network mapped drives but not the mobile device.Ultimately I'd like to do file copying when my program detects a mobile device has been connected.
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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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Dec 1, 2008
I'm looking for a way to detect when a new USB mass storage device is inserted in one of the pc's USB ports... I need to get it's drive letter and check for the existence of a particular file.
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Sep 14, 2009
I'm writing a small application to detect the insertion of USB memory sticks and prompt the user to accept the device or reject it. Rejecting it would prevent its being loaded by Windows. I have the code that detects insertion & removal working fine but have no idea how to cancel the insertion.I was thinking that I could intercept the DEVICEARRIVAL message and kill it off before its actioned by Windows but I am lost with this.code to show the way.Heres the main part of the code I have so far-
Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
'This kills off any 'autoplay' capability in the stick
If QueryCancelAutoPlay = 0 Then[code]......
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Nov 23, 2009
I want to create an application that can detect usb card reader device and when i swipe the card it should read.The below code WORKS PERFECTLY IN VB.But when i converted it to vb.net it is showing some problem.Below is the code for that.
[Code]...
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Aug 4, 2010
how to detect mouse up event outside my app using GetAsyncKeyState ?
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Feb 19, 2012
just now I was trying to capture the F1 key on the form, but only managed when the form is selected, and I need to detect it in any form control. I used this code:
Select Case e.KeyCode
Case Keys.F1
MsgBox("Right")
e.Handled = True
End Select
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Apr 5, 2009
I have roughly 20 text boxes on my form,When you press tab, it naturally selects all text in the box (highlighted in blue), so you can press any key, and it replaces it with that,That result is what I want, unfortunately, if you click into the text box, and tab back to it, it no longer selects all the text.I'm wondering how I can detect the tab event properly,I've tried adding a 'KeyDown' event to each text box, and then selecting the text, but the sub never runs, also tried detecting the tab event in my Main Form, thinking that perhaps the parent handles it and will receive that event, but.. No.I've thought of using an event like 'Activated' however, it will also run when the mouse is clicked.
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Aug 27, 2010
I know you can do it with an WMI event or overriding WndProc and looking for the right messages, but i was wondering if there wasn't something hidden in the net framework that makes this task easyer.
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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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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, 2009
I have a linkbutton in a column of a Gridview.When the user clicks the linkbutton, I have to redirect to another page.
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Jan 2, 2010
What is happening now: i click the area in the taskbar which "belongs" to my form, while it is being shown, the form remains "shown"
what i hope to get done: if the form is "shown" and i click the taskbar of my form, i want it hidden
could we detect click event of the form's area in the taskbar?
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Dec 28, 2011
I am trying to get the event firing when document is ready.
Public Class Form1
'Declaration
Public Event DocumentCompleted As WebBrowserDocumentCompletedEventHandler
Private Sub Main(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
'Dim frm As New Form1
'frm.Show()
[Code].....
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Jan 30, 2010
My application has a form which contains several Textboxes where user is required to fill up data. Once data is filled up user can click on "Save" button to save the data. I have added lost focus events to all textboxes so as to validate user input. When I click on cancel button, i want to detect cancel button click, but textbox lost focus is fired first so I get error message for textbox before my code moves to cancel button click handler. Is there any way to detect button click before lost focus event?
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Apr 10, 2011
I do a lot of programming in VS 2010 on my Windows XP Pro PC. Recently I tried testing my software on a Windows 7 Home PC. For some reason, all of the controls on my forms are slightly misplaced. I also get a bunch of unhandled exceptions I don't get on my pc. For example, one exception said it couldn't access a registry key. Another said it couldn't find the part of a path (it didnt specify which path). What's up? Why is it doing this? My Win XP PC tricks me into thinking my apps are bug free. Guess not.
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Jun 22, 2010
Is there a event detect change of Listview item count? Like it will be trigger whenever i add an item or delete an item form listview. I search on MSDN Listview Event member, but cant c any usefull.
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Jul 30, 2011
PROJECT TYPE: Windows Forms Application
LANGUAGE: Visual Basic
.NET VERSION: 3.5
IDE: Visual Studio 2008
OPTION STRICT: on
OPTION EXPLICIT: ON
I am developing a parental control application containing a feature that logs a user off of the computer after an administratively set period of time. I do not however want the application to continue counting time against the time limit when the user is not active on the computer. EXAMPLE: Child logs on and is active for an hour then leaves computer for 45 minutes to get dinner. The session timer needs to ignore the 45 minutes of inactivity. I have thought of two ways to accomplish this.
1) Use a SystemEvents.SessionSwith event (to detect the Start Menu > Log Off > SwitchUser action), or
2) Use an event which would detect user inactivity in excess of a set time, e.g. 5 minutes (similar to a screensaver).
Either event would call a method which would simulate a pause feature (as StopWatch and Timer have no pause support that I know of). I believe the 2nd option would prove to be more universally affective as 1) some users do not have Fast User Switching enabled, and 2) users would be required to manually switch users in order to prevent their inactive time from counting against them. My problem arises when I attempt to implement one of these methods. According to the IntelliSense error checking engine, I have absolutely no clue how to do either of these tasks in spite of the research I have conducted on the topic. I would prefer to go with the system idle time approach.
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Jan 16, 2010
I'm trying to create an inherited version of the ListView control that (among other things) should have a different background image if the listview is empty to if it has items.Obviously you can easily enough test the count of the collection, but I need to be able to react to the event, however there doesn't appear to be any event related to adding/removing items.
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Oct 8, 2009
Is it possible to detect a mouse leave to the left. For example: I have a label and when I hover over it the text changes to "Hovering", and when I leave the label from the left I want the text to change to "Exit left" or if I leave the label from the right that text changes to "Exit right".
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Dec 14, 2009
I Want to filter a file using filesystem watcher. In that, I want to filter more than one type. Let it be, *.exe, *.java..
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May 11, 2009
How to create a windows registry watcher application using .Net,I want this application to watch all the registry hocks and fire an event when a value change, this event will tell the old and new value for that value.
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Mar 19, 2012
I am trying to make a handle for a custom control I made. The user control consists of many additional controls within.I am using this code to add the user control to my Form.
Dim ToolBox As New ToolboxPanel
It's created and works fine.
[code]....
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Jul 11, 2009
I have downloaded 5 apps so far to get an idea on watching a dir for a file created, but every app i run i get an error like this
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