I need to stop the keystroke event when I pressed a particular key. E.g.: If press alt+tab key then that keys should not perform that operation, that should operation should be stopped. I captured that particular keystroke, but I want to know how to stop that particular operation.
I have a checkbox X1 that if checked it will check a column of checkboxes.What i'm trying to do is if the user unchecks at least one checkbox from the column it will uncheck checkbox X1. But I don't want it to run the event from checkbox X1 again because that will cause the whole column of checkboxes to be unchecked.
I have 2 subs like below, and when I make a loop with 1000 iterations and capturePicture() in it. after 700 iterations the event is not raised anymore.
Public Sub capturePicture() Try AddHandler capturePic.FrameEvent2, AddressOf CaptureDone
What I'm trying to do is your basic "You have made changes... yes/no/cancel" messagebox to show during a form closing event, and when they click cancel to stop the form from actually closing (Whereas yes would save and close, no would just close).
I'm using a webBrowser control as a simple HTML editor & I'm trying to stop the default action of creating a new <p> (paragraph) element every time you hit the enter key while typing text into the control.
I have added a handler for the keyDown event & I can insert a break tag, but nothing I do seems to be able to stop the webBrowser from continuing to process the event.
As you can see in the code I tried setting the e.BubbleEvent to false to stop the event.
The added event handler works just fine & executes before the webBrowser processes the event, but setting the e.BubbleEvent=False (or true) has no effect.[code]...
I have an event I want to do continuously until a button interrupt is pressed. Here's the pseudo Click button 1: Check if button 2 is pressed If not, do stuff If so, stop doing stuff End routine
So what I currently have is this: Dim randominteger As Integer = 0 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles StartSampleButton.Click [Code] ..... Unfortunately, it's never breaking outside of the first loop. How to get around it?
I am trying to open a MDI child form in some presenter class. In the form load handler I perform a number of initializations. If any of them fails I want to cancel opening the form. The current code does not prevent the form from opening.
Private Sub OnFormLoad(ByVal sender As Object, ByVal e As System.EventArgs) Try Me.mGridBindsource = New BindingSource()
Can we stop the SelectedIndexChanged Event of combobox at runtime? bcoz when i go to last record my sencond combo is refreshed & It will show 1st Item. but i want to see related item with 1st combo.In the database records are stored with related item.but on frontend..
Amother question is, I want to work with Datagridcombobox. My datagrid contains 3 comboboxes. When i clicked on 1st ,2nd combo should be filled. Same like 2nd third. How can we handle the event of DatagridCombobox??
I have the following code that populates a combobox:
With Me.ClassSelector .DataSource = DataAccess.Utilities.ReferenceDataUtils.GetLookupTableData("Category_code_classes") .DisplayMember = "Category_text" .ValueMember = "category_class" End With
However, the SelectedValueChanged event fires once when I set the datasource and again when I set the valuemember. In both instances there is a selected value, although that value was not selected by any user action, but rather because of the loading of the combo box.I don't think there's a 'SurpressEventFiring' property for the combobox, so how to you check to see if the change in the selection was a result of user action and not data loading?Perhaps I'm populating my combobox wrong?
The feature I'm trying to implement allows the user to press the down-arrow key and "tab" through different features on the form. Is there a way to use the keyPressEventArgs or something similar to catch that? Is it necessary to delve into hooks and processes? And if so, does anyone know a good resource for a beginner?
I'm having problem with keystroke detection, I want to detect only "enter" and "I" keystroke.If you press "enter", it will automatically close the form the datagridview located and send data to other form, I'm using keydown function, but I don't know how to detect only "enter" and "I" keystroke, usually I'm browsing datagrid with tab button, but when I press tab, it also closed down.
I'm trying to send a keystroke to a window (of an external executable) but am having problems.
If I launch the exe with a window I can successfully send it a "q" (in order to make it exit) using the follow:
1) AppActivate and SendKeys
2) SendMessage API using WM_KEYDOWN and WM_KEYUP
3) AppActivate and keybd_event or SetForegroundWindow and keybd_event
However, if I launch it without a window, obviously method 1) does not work as SendKeys only work on applications with visible windows, but I thought that method 2) would work. However, it doesn't. Also, using method 3) with SetForegroundWindow as this seems to only work with visible windows, which is not really a surprise I guess, given the name.
Another method I have tried, which won't work is using the RedirectStandardInput - I have this working correctly, but the application is looking for keyboard events, not writes to its StandardInput stream, so this doesn't have any effect.
Finally, I have tried using SendMessage and FindWindowEx, and TranslateMessage, to find any child windows or controls that should be receiving the messages, rather than the main window. However, no child windows or controls are found, and I wouldn't have thought this would be the solution given that, if the window is present, the main window receives the message as it should.
So, I have confirmed that the messages are going to the correct window, as they arrive as they should when the application is launched with a window, but I cannot get the application to receive the message when it is window-less. The solution doesn't have to involve messages, or even be particularly robust, but this is what I have tried so far (all the obvious stuff!)
Problem: Form hasn't fully initialize but shortcut keys can be usedDetails: Launch an mdi child with database access retrieving data, and user is already using the shortcut keys while the data is still been retrieve which results to error since object hasn't fully initialize yet.
Goal: Hinder user from using shortcut keys by disabling the keys at initialization then enabling it after all objects are good to go.
Another Situation is:A form with a gridview and a button.I got a hotkey that when press, handles a gridview getfocus event.
The problem is that the gridview is still making its instance and when press the hotkey, it activates the getfocus property of that gridview(which is still creating its instance).
I've got a very simple screen saver program that displays alot of stuff in pictureboxes and labels...dynamic display. I want to end the program on any keystroke or mouse movement. I've placed the statement "me.close()" in Public Sub Form1_KeyDown routine (Form1/Events). Nothing happens when I type though. I've seached the forums.....keypreview is true....
I'm trying to send a single keystroke to an application that has no window (because I have launched it with StartInfo.CreateNoWindow = True) and therefore I can't use SendKeys. I had a look at SendMessage but this doesn't seem to be quite right as the programme I'm sending it to doesn't process message queues.I would usually use the StartInfo.RedirectStandardInput property and send it via a StreamWriter but this doesn't not work as the application it is being sent to is looking for actual keyboard keystrokes, rather than pulling info from StandardInput (an old C++ programme using getch). Anyone have any ideas how to send a keystoke to an application with no window (FYI I don't need anything back from it, I don't need to wait until it's processed, and I only need to send one letter and no carriage returns or linefeeds, though these wouldn't hurt)
I was curious if there is an easy way, besides making a new custom DataGridViewColumn, that on each keystroke validation is done (while the D.G.V.TextBoxCell is being edited), instead of when focus is lost off the cell.Or in a different senerio, if there is a way to restrict user keystrokes while a D.G.V.TextBox Cell is being edited, while not relying on making a new custom DataGridViewColumn. I would go through the work of implementing this new Column, except the customer for the job I am working at wants small, managable code. And even if this is a useful feature, they would want to avoid having an extra class being made.
I am fairly new to programming and I am completing the Step by Step by Microsoft for Visual Basic 2008, but I am not finding anything in the book about binding keystrokes for a program. I want to add the Number Pad into my Calculator Program so that every keystroke on it would correspond to a button in my program but I am unsure how to do this take.
I have an issue regarding Sendkeys Class, as i want to use this class in order to send some keystroke to the active application. As a first step i want to test the {Enter} keystroke, so in order to achieve that i made a simple application in vb.net 2010
Public Class Form1 Public Shared data As String Private Sub SendintText(command As String)
[Code].....
By the way in order to use double quotes in a parameter you need "test"...(i have spent 15 min to find out) so it might be usefull...
give me the line or code on how to check the characters as you type into a textbox. What i want to do is, creating a calculator.. but on the numpad, if you strike the "*"(asterix) or plus... or what have you... then it should change the Sign to it.. and not type the actual "*" in the text box..
let me explain in more detail so you don't get the wrong idea of what I'm trying to accomplish.If I have a button object, say Button1, on my form and I select it with my mouse, it brings up another form or dialog. If in the text field property of Button1 I enter &Button1, the B will have an underscore under it and if I hold down the Alt key and press b, it too will invoke the other form or dialog. I would like to also have the capability to do that with a datepicker field or textbox field.
Right now, I can set up several buttons with Alt-keystroke combos that work by default, but it seems like I have to write some form of keystroke intercept routine and test for the conditions I'm looking for and force the focus to the datepicker or textbox. Am I missing something? Is there a better way to do this? Or is there actually a way of setting up a label on a textbox or datepicker object.
Kind of like when you're using MS Access and building a report, the fields have a leader that you can type a label in. That's what I'm looking to do. So if the label part of the datepicker field says Date: if I press and hold the Alt key and press d, it will invoke the datepicker field (aka open the calendar for selection).
i have problem when i click a ADD button, there is one null value in the textbox .. so the try catch statemnt is to catch that null value error but after that the catch is success but the button click never stop excute the statemnt till the end of the button event.
i am working on read line by line . At each line that my app read , i added a event . How do i read a text file till the end and Stop it? there is how it work :
what I would like to do is create a program that runs in the task bar next to the time. What I want this to do is listen for the key stroke combo of CTRL-ALT-T no matter what program they are in. When they hit this key stroke I want the program to do is hide the task bar on the bottom of the screen. you know how you can change the hight to two rows one row and so on but you can also drag it down so it has no rows and can't see it. Then when they hit CTRL-ALT-T it will then display the task bar with what ever the hight wa set to. Just don't know what direction to go to do this.