Uniquely Identify A Device From The Code?
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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Jun 15, 2012
I have a form which creates controls dynamically and adds event handlers by itself (already coded that part). As for now, I have a hidden table with the object list which loops through the controls and finds it by name (using the Me.Controls collection). How ever, does anyone knows if a dynamically created control may have a special unique code ?
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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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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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Jan 24, 2010
How to identify the x64 or x86 of the OS and a Process in managed code?
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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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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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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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Apr 17, 2006
I'm having a problem when trying to identify if the CD on the drive is virgen (CD-R or CD-RW).I'm using the following code:
Public Function ExistsCDOnDrive(Drive As String) As Boolean Dim FSO As New Scripting.FileSystemObject If FSO.Drives(Drive).IsReady Then ExistsCDOnDrive = True End IfEnd Function
[code].....
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Jan 18, 2010
How to convert every key to something that i can identify.E.g. This returns the actual character "a" or "b" or "6". Not in the format i need it to be.[code]....
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Nov 8, 2009
How to my Application identify . About Windows Restart Timing And How much time Windows Restartand Thats alllogging it in Txt filei mean My application Logging Text oftime and date when Its Process Killed Like Closed
that is VB.6 code something Acording to my thread
Private Sub btnWaitForExit_Click( _
ByVal sender As System.Object, _
[code].....
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Oct 21, 2009
I've got a simple Windows Form Application that will tell you the drives on your computer, in a multi-line format using a Rich TextBox.So, If there were the C:\ and d:\ drives on my comp then It'd look like this
C:\
D:\
So, if there is an external drive (such as a USB under the "F:\" directory named "My Data" what would be the way to find the name of that drive, assuming that I do not already know the name Here's my code.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
RichTextBox1.Text = ""
If IO.System.Directory.Exists("F:\") then RichTextBox1.Text = (TextBox1.Text + "F:\" + Environment.NewLine)
[code]...
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Sep 21, 2009
How can I uniquely identify a PC using vb.net code? Finding the PC name wil not work, as some users might use the same name. Please explain step by step, as vb.net is new to me.
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Feb 3, 2010
I am writing a search engine whose purpose it is to search all kind of blogs for specific kinds of content.I'm particularly focusing on these blogs engines:
Blogger
LiveJournal
MySpace
Open Diary
[code]....
Is there any way I can use google to find links that are from a specific type of engine, like for example wordpress?
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Jun 26, 2009
We are trying to identify the best archtecture while using a ORM like LINQ to SQL. The archture we are defining is for sort of framework that other applications will access either trough directly referencing the DLL or through a webservice. We have .NET apps and PHP apps.The possibilities are: Multiple data contexts: Separting the database into units of work and create separate contexts for each one.
Pros:
Easy of use
Classes will be broken into different namespaces
Smaller domain to maintain
Cons:
Objects have to be duplicated if
related, creating maintenance hell
Objects cannot be passed between context, creating the need for another hit on the data base Single data context: All tables, views, procedures, reside in the same huge context.
[code]....
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May 6, 2009
I have a large string in which I need to replace specific strings with other values. For example, within this string I might see the following characters: [[sub id=5]]. I am trying to replace those substrings with values, pulled from a table and based on the id. What would be the simplest way to accomplish this. My first thought was to loop through and examine each character and note their positions when they match the pattern. I would then have to identify the id. That would be fairly complicated, however, and there must be a better way.
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Jan 6, 2009
I have 2 buttons that will open the same form. but depends on which button is calling, the operation will be different. How can I identify that this form is called from button 1 or 2.Also, if we want to have a password in the vb.net stand alone application, should we use shared property?
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Sep 20, 2011
I'm retrieveing the current path with:
Dim paths As String = HttpContext.Current.Request.FilePath
Which returns something like /VHP/hmo.aspx. What I need to narrow down is the FOLDER (VHP). How do I remove the / before it and the /filename after it?
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Aug 15, 2011
I need to identify an ID number and a password. Like this,(Form1) there's a two textboxes, one is the ID number and the second one is the Password, when I enter the two it means i Log-in, the system needs to identify if the ID number and the password is registered in mySQL, then if it is registered a message box will appear "You are log-on" and a form will show (form2) in 10 to 15 seconds that is having the information of the student, then it will automatically close then it will go back to the form1 which the another user will log-in again.
(this is Form1 too) then here is my second problem, like what i said in the first problem, the program needs to identify that the student is already log-on the school and he is going to log-out, (like this, system is going to identify that the id number and the password is already declared on the first form, so it will be the log-out code, then a message box will appear "You are Log-out".
(Form3) then here is my third problem, i need to identify how many people is inside the campus and not going out on the campus. The person or student that is not logging-out on the program or the system will be count when i click the Button 'Count' and the number of student inside the campus will be display in a 'Label'(it will be inserted also or having record on mySQL tableInside).
('Form4') then my fourth problem is the system needs to identify how many students did log-in on the campus. Or the system will identify how many person input their ID Number and Password on the first form ('Form1', it will be inserted or having record on mySQL tableLog).
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Dec 22, 2007
Let's say i create 3 different process like this:
For i = 1 To 3
im pr As New Process
pr.StartInfo.UseShellExecute = True
[code].....
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Jul 25, 2011
Does anyone know how I could get my app to show the ISP of the machine it is running on, I can get internal and external IP addresses, just need to know if possible and how to look up ISP from this information[url]...
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Apr 2, 2010
I am working with the Richtextbox for the first time. Currently I can Bold the text from the textbox (shown below) but I want to alter this so that I can do the same thing regardless of what Richtextbox I am in. How do I do this without naming the Richtextbox specifically?
VB
' Sample
Private Sub tslBold_Click( _
ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles tslBold.Click
StyleItalic(rtxtGoals)
[Code] .....
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Aug 31, 2010
Can Attributes be used to identify what property from a class is required?
For example:
Class Test
<Attribute ??????>
Public Property A as string
[Code]......
I want to be able to select a or b property by referencing an Attribute value.
For example test.PropertyWithAttribute(blah) = "something"
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Jul 27, 2010
on a network how can i identify a computer uniqulyof course not by system IP , why because IP can be changed easily or else other person on a network can change his system IP to another system IP while that IP in shut down status.hence i want to identify a system duly keeping any text file + some id written in it at any said address
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Dec 31, 2010
I have an asp button which I am using in 2 different places (appending to a new place and adding a class using jquery under certain conditions). I need to slightly alter the function that runs when this button is clicked depending on whether or not this button has a given class. Is this possible? So something like this...[code].....
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Aug 27, 2011
I am a newbie using Visual Basic 10 (Visual Studio 2010) and I am having a hard time working with my database. I have a table, let's say, TableEmployee with Fields Name and Position. On the Position Field, some of the records there were empty.My table is displayed in a datagrid and what I want to do is to insert a code that will identify whether the record under the position field is blank/empty and if that condition is true then display a messagebox that says "the particular record is empty"
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Mar 13, 2009
how to detect/identify the system login, System screen lock, unlocking the system screen & finally the system Logoff event.Basically I want to capture the system time when these events occur by creating a windows service which runs in the background.
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Sep 22, 2010
We have several programs that run during off hours and I want to write a program to monitor them. I have defined a list of priority programs and have written code to verify that they are running using 'Dim instance As Process'. The problem is that I can't figure out how to determine if the program has a pop-up error window like "unhandled exception" or similar window. The instance.responding still shows 'true'. How can I identify a process that is executing but has an error?
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May 22, 2012
I have a program that analyzes and processes a complex xml data source (without a schema).The initial part of the program reads the xml line by line and captures the data value, table name and field name for further processing. The data (xml file) is created using InfoPath. This worked fine until we started using InfoPath 2010, which uses the "empty tag" (<tag />) for empty values instead of the traditional tags with no value (<tag></tag>). Of course my program does not know what to do with the empty tags and just ignores them - no exception, and no error.My question is: Does anyone know how to identify the empty tag using the XmlNodeType object attributes (in blue)?
Private Sub Process_ReportData(ByVal vFilePath As String, ByVal vFileName As String)
' Create an instance of XmlTextReader and call Read method to read the(file)
Dim RecordsTableAdapter As New RecordsTableAdapter
[code].....
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Sep 26, 2009
I need a way to identify which cell of a datagridview (row and column) is beneath the mouse when Mousehover event fires for the datagridview control.ebassador
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