Capturing And Using Keypress Events

Apr 30, 2010

I am trying to modifying the "Math Quiz" tutorial to be more user friendly.

The initial tutorial does not consider the users efforts to answer the math problems as quickly as possible.

The problem is that you must use the mouse or tab key rather than the "enter" key to move to the next control after answering. I believe using the "Enter key to be much more intuitive.

Therefore, I wish to modify the program to either:

1. Check the KeyPress event of the NumberUpDown controls to watch for the "Enter" key to be pressed, and if it is, check to ensure that the current NumberUpDown control is not empty (= Nothing) and if both are True, to then TAB to the next control in the TAB order; OR

2. Uses the PreviewKeyDown event to transpose the "Enter" into a "Tab" automatically so the application will then TAB to the next control in the TAB order.

With all of the new changes to VB 2010 from the last version I actually used professionally (VB6), things are REALLY different, so I no longer know how to accomplish this same task in the new manner. especially if it contains working CODE, because I have always learned better the first time from an example. here is my version of the tutorial Code:

'--- Create a Random object to generate random numbers.
Private objRandomValue As New Random
'--- The Integers will store the numbers for the
' addition problem.

[Code]....

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Feb 9, 2012

I was creating some complex applications in Visual Basic .NET 2008 and since they are in the testing phase right now, people manage to find an error or two every so often that causes the program to crash. The problem is that there is a tracking piece to it that logs who is currently using the programs. When a user logs in, it logs that they are currently logged in, and if the form close event is fired, the log is deleted to show that they have closed it.

Now my problem comes whenever the form crashes from an error since it won't trigger the close event and therefore makes the log become inaccurate. My question is if it is possible to capture any error that the form would have in the form of an event?

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Get App To Trigger Som Events On A Keypress?

Apr 3, 2009

trying to get my app to trigger som events on a keypress (lets say left arrow) when my form is not in focus.I've google it bu all i can find looks very complicated, is there an easer way of doing this?Or is it a very complicated thing to do?

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Keypress Events Do Not Work?

Dec 18, 2011

I can't get my key press even to work. I want to have a key press event where when I press spacebar, I will perform some things. Here is my

Private Sub gamePlay_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles MyBase.KeyPress
If e.KeyChar = "32" Then[code]....

I search the internet saying that keycharis looking for the value of a certain key that is pressed. I got 32 for spacebar. My code is not working at all.

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AutoComplete Textbox And Keypress Events

Oct 20, 2008

I am trying to do implement an autocomplete textbox in my application and I have a question about keypress event inside an autocomplete textbox. I have 2 textbox namely textbox1 and textbox2. Suppose to be, when the user pressed the RETURN / ENTER key, it will focus on textbox2. how come that on this event is not triggering.

Code:
Private Sub frmCheck_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'set autocomplete mode in textbox1
TextBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppend
TextBox1.AutoCompleteSource = AutoCompleteSource.CustomSource
[Code] .....

Also, I would like to ask if how to validate the input if the value from the textbox matches from the autocomplete values. How can I compare the values of the textbox and the autocomplete source?

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Create A Class For Keypress Events

Jun 5, 2011

is it possible to create a class which has the majority of your keypress controls? Like allowing just letters or numbers in a textbox etc. To make things clearer what i exactly want. I have a textbox on my form. This is a textbox for the postcode. The postcode is supposed be something along the lines of AA 1234. This will be checked on lostfocus.

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Handle All Keypress Events Within A Single Sub?

Dec 17, 2010

From within the same form is this possible? I could eliminate a ton of code if this were possible.

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KeyDown And KeyPress Events Not Responding

Mar 7, 2009

In the application I'm working on I use F1 and also a right mouse click to close the application since the graphics display full screen and there's no control in the upper right corner to close with. I use a good number of different keypresses to control things and everything works fine. When I switch away from the form that the applications starts in to a different form I'm not getting any response from either a KeyDown or a KeyPress event. Maybe someone knows what's going on. The ButtonClick and MouseDown events are responding just fine but for some reason the KeyDown and KeyPress events aren't. Below is code for one of the Forms that is unresponsive in this way. [code]...

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Can Validate Textbox Text By Using Keypress Events

Jun 10, 2011

I know you can validate textbox text by using the keypress events. But the form i'm working on has multiple groupboxes with multiple textboxes. So rather than having a sub routine to validate every groupbox, i was wanting to have just the one keypress event that handles the textbox entries, and depending on the textbox calls a specific validation routine.[code]

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Handling Multiple Keypress Events In VB 2008

Oct 21, 2009

I am new to VB but I want to find this out. For example there are two objects in my form and when I press W,A,S,D then Object1 should move Up, Left, Down and Right respectively. Object2 moves when I press the arrow keys. How do I make them move together and also separately depending on whether the key is pressed.

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IDE :: Using KeyDown And KeyPress Events On The Same TextBox Control

Jun 4, 2009

I have a TextBox which Is allowed only to read certain characters. I use KeyPress event to handle this event. I understand that The KeyPress event does not handle the pressing of the DELETE key on the keyboard. I do not want the user to be able to delete characters in the txtbox by using the DELETE key, I want the user only to be able to use the backspace key. I am writing this code in Visual Basic 2005. The following code appears to work in handling the DELETE key, but I am concerned that I might get bitten by the fact that I am using KeyDown and KeyPress on the same control (txtSource).

private sub txtSource_KeyDown(byval sender as object, byval e as KeyEventArgs) handles txtSource.KeyDown
IF e.KeyData = System.Windows.Forms.Keys.Delete then
e.handled=true
end if
end sub

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How To Hook Up Keypress Events For Cut / Copy And Paste Routines

Nov 5, 2009

I have a Windows Forms app, with a TabControl. On the first tab (which is a bunch of textboxes), the CTRL-x/c/v keyboard shortcuts for cut/copy/paste work as expected. On the second tab (which is a DataGridView), the keyboard shortcuts don't do anything. How do I hook up these keypress events to my cut/copy/paste routines? I already have great cut/copy/paste routines for my DataGridView--and they work fine when launched from the tooltip buttons or menus. I just need to hook up those subs to the CTRL-x/c/v keypress events.

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Looked Up A Number Of Pages On KeyDown And KeyPress Events?

Oct 27, 2011

Looked up a number of pages on KeyDown, and KeyPress events, and am just more confused than when I started. I am trying to get an event to fire adding value to a total when a user presses the Enter key. Not getting any compiler errors, and have tried utilizina MSDN's suggestions for IsInput, and PreviewKeydown. None are working..... I have tried working in the KeyDown using e.keyCode = Keys.Enter, and KeyPress using e.keyChar.Equals(Keys.Enter) in my conditionals.

Protected
Overrides
Function IsInputKey(ByVal
keyData As System.Windows.Forms.Keys)

[code]...

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Missing Control.KeyPress Events With Ps/2 Barcode Scanner?

Feb 3, 2012

I have a application written in C# using a usercontrol which inherites from control.

On this control i want to use a PS/2 barcode scanner. Get recieve the response i user control.KeyPress. Some some of the chars gets filtered mostly the double chars.

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Capturing Events Of A Form From Another Form?

Mar 21, 2009

- Assume there is a form called form1 in the "view" of the MVC - Assume there is a class library called Controller1 in the "Controller" o fhte MVC. Assume there is a button called "btn1" in form1. form1 and controller1 is in two different projects.

[Code]...

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Jquery - .NET Serialization And Weekcalendar - Undefined Events.events

Oct 13, 2011

I have been trying to implement the jQuery weekcalendar using .net. What I can't seem to figure out is why weekcalendar states events.events is undefined after I make an ajax call to a webmethod I created which returns JSON. Below is the relevant code:

[Code]...

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Make Keybord Events And Mouse Events for Learning?

Aug 2, 2009

I want to make Keybord events and mouse events for learning and educational Purpose.

1. In Form any object like A "picture box" move by Arrow keys .

2. Picture Box Contain many Picture i want change Picture With next and Previos By Arrow keys.

3. I contain Voice of alphabet in Mp3.When i Press any button in textbox then its work.

4. Mouse Pointer Change My Own.

5. I click any Object or any thing By mouse its noice clicking sound like Tik Tik Tik.... Question No 3 is very hard to do . but not im possible

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Jun 4, 2011

I want to capture a still picture in any format like .png,.jpg,.bmp etc. using a webcam.And want to save that in directory.

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Capturing Text From Cmd.exe?

Mar 14, 2010

How can I capture text from cmd.exe window? Tried GetWindowText, but this only returns the title.

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.net - C# DataGridView Capturing Deleted Row?

Jun 16, 2010

I am using a DataGridView, which is bound to a dataset. There is a bindingNavigator as well.

when a user deletes a row by clicking "bindingNavigatorDeleteItem" button, I am trying to get the row being deleted.

private void bindingNavigatorDeleteItem_Click(object sender, EventArgs e)
{
int crow = gridEventType.CurrentCell.RowIndex;

but it returns the newly selected row AFTER deletion of a selected row.
so, If I have two rows

0
1
2
and I delete 2

crow is 1, not 2.

Am I missing something here?

2. How do I know whether certain rows are modified in datagridview?

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Capturing A Section Of The Screen?

Oct 19, 2006

I am trying to make a simple personal program and cannot figure out how to capture a section of the screen.I want it to work like prt scr does except it captures a specified rectangle instead of the entire screen. I am thinking I have to use Drawing.Graphics but am not sure.

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Capturing A Timers Time?

Feb 8, 2010

The below is my program so far

Public Class Form1
Private Display As Boolean
Private WithEvents tmr As Windows.Forms.Timer

[code]....

Upon clicking the button a series of letters are displayed to the screen.I would like to be able to capture the time taken to press the letter shown.

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Capturing Ingame Screenshots?

Dec 7, 2011

Okay, so I know how to capture a screenshot of the Active Window, but if the active window is a game, then the screen is just black. What do I need to do to be able to also capture ingame screens?

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Capturing Sound Before It Is Played?

Dec 1, 2009

I was wondering if there is an easy way to analyse sound that is sent to the speakers (just before it's played). For example when playing a song in winamp or windows media player. Or is it easier to write plugins for those programs to form an interface with your own program?

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Capturing Value Of DataGridView CheckBox?

Aug 9, 2010

I have a datagridview (unbound). Fields are Name, Family Name and Phone No and a checkbox colum.

There are ten rows in that DataGridView.

There is an OK button

I need to get message of showing which rows user has checked. The message should appear when user clicks OK button. There could be several message, checking each row one by one, in a loop.

I am not able to get this message. I tried following code in OK button

Dim strCB As String = dgvChooseQs.Rows(0).Cells(3).Value.ToString

Cell(3) is my checkbox. Donot consider Rows(0), at the moment I am just checking value at row 0

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DataGridView And Capturing The Enter Key?

Jan 16, 2008

I have read and tried a dozen or more examples of trying to capture the Enter key in a datagrid, but I have yet to find something that works. My scenario is :

ds.Tables.Add(dt)
dt.Columns.Add("Inventory Nr", GetType(System.String))
dt.Columns.Add("Cases", GetType(System.Int32)) Inventory Nr in the next row.

[code].....

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DirectSound Capturing Microphone In VB

Dec 18, 2010

I'm currently trying to Capture through DirectSound, I've been trying toying around with WaveLib(Ported to VB) but this is very confusing. Anyway, I cant figure out how I am supposed to do this and would like some assistance. The end goal of this project is to: Record Microphone > Encode with Speex Codec > Send over UDP > Decode > Play on Speakers

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How To Screen Capturing In-game

Nov 18, 2011

i use with this code: Dim bounds As Rectangle

Dim screenshot As System.Drawing.Bitmap Dim graph As Graphics bounds = Screen.PrimaryScreen.Bounds

screenshot = New System.Drawing.Bitmap(bounds.Width, bounds.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb)

graph = Graphics.FromImage(screenshot)
graph.CopyFromScreen(bounds.X, bounds.Y, 0, 0, bounds.Size, CopyPixelOperation.SourceCopy)
PictureBox1.Image = screenshot

But when I try it in games,it shows only a black picture.

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Still Image Capturing Using A WEBCAM

May 28, 2007

I would really like to get some VB.net program code for still image capturing using a Webcam.I've searched the web for quite a while now but did not get any codes. Currently i have a code for capturing video. In that code an image can be captured, but only with 640 X 480 resolution (Maximum Video resolution for my web camera). The WM_CAP_DLG_VIDEOFORMAT dialog box only allows the resolution to be set up to 640 X 480.

[Code]...

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Add The Mouse When Capturing The Screen Or Monitor?

Jul 18, 2012

I'm just wondering if it's possible to add the mouse when capturing the screen or monitor in vb.net?

because I'm doing a project that would record the screen and I'm actually successfull doing that by capturing the screen and include it in a timer, but my only problem is the mouse or the cursor isn't showing.

below is my sample code.
Dim ScreenSize As Size = New Size(TotalScreenWitdh, MonitorHeightArray(0))
Dim BMP As New Bitmap(TotalScreenWitdh, MonitorHeightArray(0))

[Code].....

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