VS 2008 Getting Handle For Registry Key?
May 11, 2009
I have a section of code that will compile perfectly using VB Studio 2003, but it throws a InvalidCast Exception under VB 2005/2008. The code throws an Invalid Cast exception at KeyHandle = e(field.GetValue(KeyToMonitor) line below, and as far as I can tell it is because the variable Field is passing the string Microsoft.Win32.SafeHandles.SafeRegistryHandle rather than an integer. Is this because of safe keys in VB 2005 and 2008?
how to call the handle of the registry key opened in a way compatible with Safe Keys? I'm using the code to notify when a registry key is changed using RegNotifyChangeKeyValue.
Private Function WaitForChange() As Boolean
Dim notifyEvent As New Threading.AutoResetEvent(False)
Dim KeyHandle As IntPtr
[Code].....
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Oct 15, 2009
I have a program that implements various registry changes. The problem is depending on the version of Windows the registry entry may not exist. If that is the case an error is thrown since it the registry key does not existThe code is below that actually calls the changes if the checkbox is checked or unchecked. The functions contain the registry changes which are all correct the problem is the error handling I have implemented below it seems to be causing a problem in te program where the rest of the code afterwards is not getting executed properly. What is supposed to happen is if the checkbox is checked it will run the disable function. However if that registry key is not found the program will give a message with a box saying that item does not exist and then it will automatically uncheck the box and turn the checkbox text red. There is more then one of these also. It does do this however it doesn't seem to execute the rest of the checkboxes after it in the code.
If the box is unchecked it will uncheck the checkbox thereby enabling the function
[CODE If chkMyApplicationsService.CheckState = CheckState.Checked Then
Try
[code].....
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Mar 23, 2010
how do i write to the windows registry and read from the registry?i'm using windows 7 - 64 bits, and visual studio 2008.
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Jan 21, 2009
Error is coming Registry Access is not allowed.While Opening a Key.
Code:
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
NewDelete("HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun", "Sonia")
End Sub
[CODE]...
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Jan 31, 2009
I've had a bit of a look around the net and on the forums but I've yet to find an answer to my question. I've got Visual Basic 2008 Express and I'm trying to write some registry entries, I can write strings fine just using
[Code]...
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Jul 6, 2011
I have a program which uses TcpClient, the issue I'm having is how do I construct the packets when some of them come in seperate parts. For example, If I receive 5 packets, 2 of them are fine, but the other 3 have come in seperate parts when it's suppose to be a whole packet. How can I handle this?
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Feb 28, 2010
I don't know how much sense the title makes, but let me give you an example:If you've used Xfire, you may have run across links that allow you to modify things in the program such as your status.This is an example of a status changing link:xfire:status?text=I%20love%20Donkey%20Kong%20Jr.And your status will change to "I love Donkey Kong Jr.
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May 30, 2009
I'm using this code to get the StartMenu handle:
Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal IpClassName As String, ByVal IpWindowName As String) As IntPtr
Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" (ByVal
[Code]....
But it doesn't seem to work, I can get the taskbar handle but not the start menu handle
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Jun 9, 2011
I have a small program which loops records of one datatable against records of another datatable. I use a function that places two fields of the 2nd DataTable into an array. The problem I have is that if there is a NllValue in one of those fields I recieve an error message unable to cast Null to type Double.
[Code]...
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Feb 26, 2010
I have the following code to handle keypresses on the form:
Private Sub Form1_KeyDown(ByVal sender As Object, _
ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
Debug.WriteLine(e.KeyCode)
[Code].....
The first time I press any of the arrow keys the code is not executed and a NumericUpDown(NUD) on the form gets the focus. The rest of the times the arrow keys are pressed everything is fine, until I click on a button. Then the problem repeats, focus NUD, then fine.
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Nov 22, 2009
i've created an array of checkboxes like this
CheckBoxesArray = New CheckBox() {CheckBox1, CheckBox2, CheckBox3, CheckBox4, CheckBox5, CheckBox6, CheckBox7, CheckBox8, CheckBox9, CheckBox10, CheckBox11, CheckBox12, CheckBox13, CheckBox14, CheckBox15, CheckBox16, CheckBox17, CheckBox18, CheckBox19,
[code]....
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Oct 1, 2010
what's the best way to handle the updates to the database.For example i have one datagridview that's binded to a datatable (with two fields, id auto incremented and a varchar). The user can do all the operations Insert, Update, Delete.If i insert one row (only the text) and call the update method to save the changes to the database, and after that remove the same row and call the update method the adapter will throw a exception because it didn't update the datatable with the value of the id. So the best way to do this is always calling the fill method after every update?
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Aug 24, 2009
I have a DLL that copies an Access database, opens it, reads it, and then closes it. The second time through it is unable to copy the Access DB because the EXE has an open handle to it. The EXE does not reference the Access DB at all, it just has the open handle because it calls my DLL. After I close the DB, I would like to terminate the EXE's handle to the Acess DB. BTS - I wrote the DLL and it is my Access DB. Another company wrote the EXE and I can not make any changes to it.
[Code]...
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Mar 28, 2011
How would I use FindWindow to get the handle to a textbox on my form?
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Mar 23, 2009
I wrote an application to handle a joystick with directinput. It works fine if it uses the handle of the main window but it doesnt happen the same if the handle is the one of the component that contains the joystick's operation.
I mean:
main form handle: 15
component handle (which is inside the window and the joystick needs the focus of this component to work): 25
It always work if the handle i initilizate the device is the main form (15).How can i use only the handle of the component?
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May 3, 2011
I have a table called ConcernedParty. It has an ID field, description and a TypeID which is a foreign key to the pk TypeID column of a table names ConcernedPartyType.Now i'm creating two classes. One for each table. In my ConcernedParty class I have and ID, Description property etc. how must I handle the TypeID in my ConcernedParty Class.
Do I declare it as:
Public Property TypeID as ConcernedPartyType
Or
Public Property TypeID as Integer
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Sep 17, 2009
Is it possible to send keys to a specific windows handle without having to bring that window to focus?Right now I have the following code almost doing the trick:
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function SetForegroundWindow Lib "user32" Alias "SetForegroundWindow" (ByVal hwnd As Long) As Integer
Sub SendKeysToApplication(ByVal AppTitle As String, ByVal Keys As String)
[code]....
It will bring the windows calculator window to the top and set the value "1" on it.Is it possible to send the keystroke without poping the window?
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Sep 6, 2009
How to find window handle by its position?
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Apr 11, 2012
Is there a way I can catch and handle two different exceptions within the same exception type? For example:
Try
' My code
Catch ex As System.Net.WebException
End Try
I have 2 different exceptions that are System.Net.WebException. I want to handle them different ways. Problem is the catch block above catches them both. Is there a way I can determine if which of the two it is and handle them differently?
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Sep 12, 2009
Say I have a button that creates more buttons with a random .Text property, and placed them on the form in different locations. And since these buttons are being created at runtime, I want to be able to have an event handler for all button controls on the form that makes the form's text the same as the sender's text.
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Sep 10, 2009
Is it possible to handle a groupbox rightclick-event in VS 2008? I want to display a dropdown menu when my groupbox is rightclicked, but it seems that a groupbox doesn't have a click-event... Is there a way to make this happen?
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Jan 7, 2010
does anyone know how to remove another application's taskbar icon from the taskbar but leaving the window still visible on the desktop for the user to use? I need to do this during runtime using the window handle if that is possible,
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Nov 18, 2009
How can I set a file extension to open with my application?
Also how would I handle the file that it opens with?
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Jul 14, 2011
Currently, I am try to get the email addresses that have been saved or stored by the user of the computer. This isn't the emails that the user has sent or received, or the contacts he/she has in his address book. Just simply the email accounts that have been accessed from the computer.I know that there are some locations stored in the registry that have the email account. The email addresses that are used on the current computer. I just can't seem to find them on my computer.I am not sure if the registry is the only place to find it or if it stored on the web browser such as internet explorer or google chrome.
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Aug 27, 2008
I am writing an application that connects to a specific com port. This com port can change depending on how many physical ports are on the PC, and if other USB devices have installed com ports before this one.
I have the communication to the com port all working great, but I need to get the com port description not just the "COM#" which is all I currently get.
I found in the registry where the description is stored but am having trouble doing what I need.
In this key:
Code:
HKEY_LOCAL_MACHINESYSTEMControlSet001ControlClass{4D36E978-E325-11CE-BFC1-08002BE10318}
there is a varied number of sub keys. The are numbered 0000-NNNN depending on how many ports you have. Inside each of these keys, there are multiple values, although I am only interested in one or 2 of them.
My problem is, that I do not know how to get a list of the subkeys (the 0000-NNNN keys/folders) from the original key I posted. I have looked through a few registry tutorials, and I can view the default value in the listed key, but I could not find how to list the subkeys of the listed key.
Does anyone have any sample code they could share that shows how I can get a listing of subkeys, and then run through those subkeys checking for a specific value in one of the strings contained in the subkey?
I am using VB.net 2008 and Windows XP.
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Aug 23, 2011
Is there another way to handle the leave event of multiple textboxes other then coding in each event handler? I may not be using correct terms instead of doing this: (Existing)
Private Sub leveladjstvaltxt_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles leveladjstvaltxt.Leave
If Me.leveladjstvaltxt.Text <> "" Then
Dim levels As Integer = CInt(Me.leveladjstvaltxt.Text)
Me.leveladjstvaltxt.Text = Format(levels, "#,###")
I have 30 TextBoxes all need same formatting , so I was trying to come up with something like this: (trying)
For Each ctrl As Control In Me.Controls
If TypeOf ctrl Is TextBox And ctrl.Text <> "" Then
Dim val As Double = CDbl(ctrl.Text)
CType(ctrl, TextBox).Text = Format(val, "#,###")
End If
I am stuck though and don't know where I would place that code if this is something that is even possible. Only thing I can currently think of is in the leave event which defeats the purpose, I wanted to avoid having to place the code in 30 different textoxes leave event.
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Apr 8, 2009
I have a need for an application with a SQL database back-end. The application will run on a laptop and will therefore be used both on and off the network. I can write the app and I can link it to SQL over the network. I also know how to dynamically change the connection string so I can handle online/offline data source connections. Where the data can be stored on the local client? I'd like the data to be held in the central SQL DB and to automatically copy to the laptop upon connection to the network. The client data source is read-only and will not upload back to SQL. I've seen XML mentioned but that looks overly complex.
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Apr 25, 2010
I want to handle the events of my serial input buffer. [code] My programming skills are not really that great so I've got a question:How can I trigger a sub (for example: ArduinoSerialInput) as soon as this event is handled? I've tried some code but without success, that's why I decided to post on the forum [code] I use a piece of hardware to send data to my COM port, but nothing happens.
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Jan 30, 2011
There is a panel which contains 2 components: a label and a TreeView. The hierarchy, obviously, looks like this:panel1 // handles Enter event
- label1
- treeView1
I need to do some UI updates when user starts interacting with any of these 3 controls. My attempted strategy was to catch the Enter event of the panel, which would fire when user clicks a label, or TreeView. This way, I can write only one (1) event handler instead of several. While it worked for the TreeView, it didn't work for the label. When I click the label, I don't get the Enter event on the panel. Whats different about the label control? I could handle the Click event of the label. At the same time, I wonder what the other solutions might be.
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Oct 5, 2009
How can I find the mixer handle for a specific sound card?I'm trying to build an application that will control the sound mixer of a specific sound card but I'm completely stuck in the getting the handle part.
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