Possible To Use Exclamation System Event To Validate Data Capture?
Aug 23, 2010
In a Windows XP Pro environment, my system uses a mainframe emulator in a window in which a scanning application is running. The data populating the mainframe app comes from various instruments, scales, barcode scanners, etc.. The data inputs are captured by a winwedge type RS232 data aquisition software.
When all the data is processed correctly, the mainframe application sends an "operation completed" message and creates an exclamation system event associated with a specific sound to inform the user.
My goal is to create a MS Access application that would use the Exclamation system event to validate writing the barcode that was just read to a database without further querying the mainframe, creating a local database. I only want to write the barcode when the mainframe application completed and therefore played the sound.
Is there an easy way for me to capture some system data when I except? Particular memory information. I have a service that has been running fine for years, but lately it keeps having System.OutOfMemory exceptions being thrown at random. I want to determine what memory the system is actually using then if possible to see if I am really out of memory.
I have alot of experience in working in VBA for excel, but not so much experience in creating my own structures so it's all still a bit foggy. I'm trying to capture the event for when the F1 key is pressed, not just when the form is active, but anytime the program is running. The code below expressing the handling is automatically generated for me in VB Express... But I'd like to change the situation to encompass anytime the program is open. I guess I have to reference events that happen in windows in general, but i don't know how to do it. I think i have to create the even in a class module?
I have a datagridview that I would like to validate using the cellvalidating event. however as the user doesnt navigate between cells or rows in the datagridview. just enters data in a cell in the datagridview and then clicks a save button the cellvalidating event doesnt get fired.
Is there a nice simple way I can validate that text box using an If statement to make sure it follows the rule [#][#]:[#][#] (The #'s are single numbers) and not allow anything but a ':' to separate the pairs?
I'd like to create a WebBrowser for the purpose of taking a screenshot of a website. Once its finished it will update a thumbnail image in a ListView. I'd like the whole operation to be done in the background so the UI remains responsive.I toyed with Creating the WebBrowser in a new thread and calling Navigate. I can use a loop to watch for the ReadyState of the webbrowser before I do the screencapture. However it will only continue with the thread if I use Application.DoEvents in that loop. I've never been a huge fan of doing this and would prefer to watch for an event instead. However if I add a handles clause to the WebBrowser it doesn't fire (I tried creating the WebBrowser in the thread, and also tried by declaring it as shared within the class scope).
Ok, so this is VERY simple to do IF I was working with a regular Textbox control. But of course, Microsoft does not have an "AcceptsReturn" property for a MaskedTextbox Control.
So, if the user finishes typing in the MaskedTextbox control and hits the [Enter] key.... How do I capture that key stroke with this type of control? Also, what if this MaskedTextbox is on a UserControl, not a regular WindowsForm?
I have the following code to control how a form is shut down. Specifically, when they click the red x at the top of the form. My question is, how do I control the minimize button at the top of the page. I want my forms to minimize to the information bar instead. I know how to send it there if I can capture the minimize event.
Private Sub xmlTest_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing e.Cancel = True '--- will not close form
I've been searching all over and I'm either not searching for the right words or it just doesn't exist. I've got a datagridview (dgv) on a form with some textboxes that are databound to different fields in the dgv's datasource. I want to capture an event if someone changes a value through one of the databound controls so I can mark the row as modified. I've been going through the dgv events trying to capture something, but I can't find anything that fires when a value is changed. The dgv is read only, so the values can only be changed through the databount textboxes.
How to I know if someone changes a value in the dgv? Is there a setting in the dgv that will tell me if a row is modified?
I have a vb form with a webbrowser control on it.my application connects to a website that my company uses to view footage.the problem is that everytime you click on a link on the website it opens up a new window, which basically defeats the whole purpose of me having a browser on my form.
i need to capture the new window and enter the URL of the new window into my browser.
Listening for an event from one program and capture it on another?is this possible, I'm asuming I would want to send a system wide event so I could capture it.My scenarioLet�s say I have this separate Splash animation (a series of png/bmp etc) but instead of having them in the main program itself I want them separate in a DLL/EXE.So how can I raise an event (probably system wide event I would imagine) letting the Main program know that the Splash DLL/EXE has finished it animation so the main app can continue?
I have a DataGridView which currently uses the built-in CellClick and CellDoubleClick events. I want to capture a CellRightClick event also if that is possible?
Is it possible to capture all/any audio played by a PC into a system.io.stream, so that it can then be run through speech recognition (System.Speech.Recognition.SpeechRecognitionEngine)?Essentially I'm looking to pefrom speech recognition on any audio on the client PC, google seems to suggest that capturing a stream like this can be done using Microsoft.DirectX.DirectSound, however I cannot honestly determine how.
I need to write an application that works in background.I'm writing my application in vb .net, but I don't know how to intercept system hooks by using .net classes.I know that there are windows apis such as SetWindowsHookEx, etc, but I just wondering if there is a way to use .net classes or methods such as WndProc.I tried to use it, but it works only if the form has focus active. My application must work in background.
i've managed so far to get a global mousehook + i'm hoping to capture the selectedtext from anywhere system wide when the user left clicks.
i tried using the keybd_event api to send CTRL+C to copy any selectedtext to the clipboard but it has unexpected effects + seems to run before the text i've just selected becomes selected.
here's the code i'm using:
Public Class Form1 Private Declare Function keybd_event Lib "user32" Alias "keybd_event" _ (ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Integer, _
I know generally it is not the best solution for a child to handle an event of parent. Take this for example; Mainform loads UserControlOne, UserControlOne handles all UserControlOne needs to. How ever we need a MenuStrip/ToolStrip. MainForm does not need to know much about what UserControlOne is doing. Other then receive some information on a statusbar. Right now events are controlling this.
The menustrip/toolstrip need to be able to speak to UserControlOne, for example when buttons are clicked on the strips. Would you; Allow the child to add a handler to capture the parents event? Move the MenuStrip/ToolStrip/StatusStrip all to UserControlOne so we can ignore all this event hassle? My Major concern with this is now we have taken all the head ache away from MainForm and crushed it into UserControlOne. Any suggestions?
i am using the following logic to capture the keypress event in a dataGridView so that I can edit numeric cells but cannot capture decimal value in my code i cannot pass the digit.
The image below shows a part of my Login form . The program works fine and I am able to login when I press the Enter Button. But I want to Login when I press My Enter Button (Return Button) on my Keyboard. How can I do this ?
it's a windows form program, what am i trying to do is, when i press ctrl+v (yes pasting) in other program, whether it be notepad or a text box, something also happens in my program.
So i need to capture the keypress event when my form does not have the focus.I would hate to create a windows service for this, but if there is no other way i might have to do it.
I have to handle a particular kind of KeyDown event. I have made a new virtualdesktop for my GPS Windows CE based thats launch an external program (like TomTom). I have to handle and capture event when key wheels are pressed (volume control). I know only like as "Private Sub Form1_KeyDown()" but this function works only when Form1 is focused... How can I continue to get and traps event when my TomTom is still running and focused?
I have a TextBox control being used to capture an IPAddress from the user.I want to be able to allow them to change that IPAddres at which point the new value will be utilized by the appropriate .NET socket class to ping that new address.What other event is used with TextChanged to indicate that the user is done making changes to the TextBox. The Leave Event?
How To Design an Outlook AddIn to capture New Mail Event In Vb .net. I've been able to use code to read the number of unread email messages in an Outlook Inbox. I'm trying to design a plug-in which will be more functional and Catch whenever the SendReceive event is fired. Can anyone point me in the right direction?
I am writing an outlook addin that is supposed to check for any new email messages. I am trying to attach to the send/receive action that occurs within Outlook (Either auto S/R or manual S/R). I have read on a forum online that there is no such event as a Send'Receive, how ever you can use a NewMailEvent. Can anyone demonstrate how this could be done in VB 2005/2008? I would like the Plug-In to check everytime Outlook receives new email.
