.net - Focus On KeyDown In .NET?

Jan 29, 2012

Basically, for my first VB project, I am creating a virtual keyboard where a sound is played from the resources on KeyDown. So far, the program seems to work except for the fact that each key needs to be clicked by the mouse before the sound is played by pressing each key (hence put the object in focus), where I need the key to play the sound without clicking the keyboard key (put the object in focus on KeyDown). Below is an example of my code:

Private Sub C_KeyDown(ByVal sender As System.Object, ByVal e As PreviewKeyDownEventArgs) Handles C.PreviewKeyDown ' C is the label attached to the first 'Rectangle' (Key)
If (e.KeyCode = Keys.A) Then 'The A key should activate the C key on the keyboard

[code]....

I have KeyPreview set to 'True' under the form's properties.

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Set Focus On The Keydown Event So After The Button Control, Sets The Focus Into The Keydown?

Dec 15, 2010

Is it possible to set focus on the keydown event so after the button control, sets the focus into the keydown? although says often control can have focus,.Putting a button and a keydown event on a form...

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VS 2010 Button Focus Messing Up Keydown Events?

Mar 4, 2011

I have an application similar to calculator, with button from 0 to 9, Enter and Clear. I made it possible to use the buttons by clicking on them and also by using numpad, like shown below: Private Sub Form1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown

Select Case e.KeyCode

[Code]...

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Forms :: Changing The Backcolor Of A Control When It Has Focus And Lost Focus?

Feb 16, 2011

Is there a more efficient/easier way changing the backcolor of a control when it has focus and lost focus? Let's say I've got 10 text boxes. Right now I would have 20 different events...10 for Enter event and 10 for Leave event. Of course, entering would change the back color to "green" and leaving would change it back to "white".

[Code]....

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Window Focus - Right Click On The NotifyIcon, Excel Gains Focus?

Mar 10, 2009

Here is what I've done:1) Created an Excel COM add-in for Excel 20032) Added a NotifyIcon to the Windows taskbar notification area (aka system tray) during ThisAddIn_Startup3) Added a ContextMenuStrip with a ToolStripButton to the NotifyIconWhy is it when I right click on the NotifyIcon, Excel gains focus? If after clicking on the NotifyIcon to display the ContextMenuStrip I choose not select an option on the ContextMenuStrip and instead click back on the Excel window, I get a weird flashing cell in Excel.I've created a video of the problem to help you see what I [url] anyone know how to prevent this? Ideally, I'd like to be able to click back on Excel and only have the ContextMenuStrip close and Excel regain focus.

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Forms :: Form Losing Focus - Keeps Loosing Focus ?

Nov 26, 2009

I have two forms in an application. One is he background and then I show another keypad form called with the show() method (not showDialog) because I need to perform some validations on btn click.

The kepad has 10 buttons and an Enter Button. The problem is that the form keeps loosing focus (I checked this with a messagebox which keeps poping up once for focus=true and again for focus=false, it continuously keeps losing and gaining focus) so it does not process any keypress events untill i click somewhere on the form. I tried using me.focus() in form load event but to no avail. The forms TopMost property is also set to true.

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C# - Books With A Focus On .NET Framework And Not So Much With A Focus On The Language Used?

Jul 18, 2010

recommend a book that focuses on the .NET framework in general and isn't too language specific.

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Lost Focus Event, What Control Is Getting Focus?

Mar 21, 2012

I have a textbox on a form that when it loses focus it updates other text boxes on the form. But before it updates the other textboxes I check the input value in the textbox lostfocus event if it is undesired I return focus to the the textbox and alert the the user with a msgbox. However where my problem is, is that when the cancel button is clicked I don't care what the input in the textbox is because the changes are being canceled but if the value is undesired the it keeps returning focus to the textbox instead of canceling the changes. Is there a way to see what control was clicked on before or in the lost focus event? Can't seem to figure it out tried enter and leave events but no luck!

So for example something like this...

Code:
Private Sub TextBox1_LostFocus(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.LostFocus
If Control that was clicked <> btnCancel then

[Code].....

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Me.Focus - Return Focus To The Form

Oct 25, 2011

After I did a sendkeys to another program from my form, i wanted to return focus to the form. i tried me.focus = true but that doesn't work.

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VS 2008 Set Focus (new Currrent Cell) Setting Focus On Specific Cell In My Datagridview1

Nov 7, 2009

I am having problem setting focus on specific cell in my Datagridview1 . On Form1 when clicking on cell 3 in any row, I am callig a Dialog1. However, when done working with it, and closing the Dialog1, the focus returns to cell 3 in my Datagridview1 . I like to set the focus on the next cell(4) making it the current cell.

I have tryed :

DataGridView1.SelectionMode = DataGridViewSelectionMode.CellSelect
DataGridView1.CurrentCell = DataGridView1.Item(4, e.RowIndex)

DataGridView1.CurrentCell = DataGridView1.CurrentRow.Cells(4)

And few other things, I am always getting this exception: Operation is not valid because it results in a reentrant call to the SetCurrentCellAddressCore function.

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How To Handle KeyDown

Jul 24, 2009

Ok here's my dilemma. here's this code I have:

If e.KeyCode = Keys.A Then
TextBox1.AppendText("C, ")
PictureBox2.Visible = True

[code].....

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Keydown Event

Aug 31, 2010

this code works

Private Sub TxtLname_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TxtLname.KeyDown
If e.KeyCode = Keys.Enter Then
If IsNumeric(TxtLname.Text) Then[code]....

when I replace the keys.enter with "keys.tab" it won't work..

Private Sub TxtLname_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TxtLname.KeyDown
If e.KeyCode = Keys.tab Then
If IsNumeric(TxtLname.Text) Then[code].....

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Keydown Not Looping?

Jan 2, 2012

I'm building a slot machine, and I'm having some trouble.re's the

'Pulls down the slot
If e.KeyCode = Keys.Space Then
PictureBox2.Focus()

[code]....

When I debug and click space down, my picture box of the knob slides on down to 175, pauses, and shoots back up. The problem I'm running into, is that it doesn't do anything if I try to pull the knob down again. It doesn't bug out or anything, but it just doesn't do it again

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MDI And Keydown Event?

May 26, 2010

my child form is a game that allows user to move using keydown event (arrow key left and right). But when i import it to MDI, keydown event doesn't work anymore. Am i missing something here?

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My Keydown Not Firing

Oct 23, 2010

ABCDE keydown events, the ones I needed, are not firing. I even set my Form KeyPreview to true but no joy.

up and down arrow keydown events work though.[code]...

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Use The Keydown Event?

Sep 17, 2008

how to use the keydown event soif you press 'A' a messagebox will popup saying you pressed A else it will say This function is not reconised i am hoping to use this knowlage to start a game so that if you press W the image will go up.

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Use The KeyDown On A Picturebox?

Oct 6, 2010

Is it possible to use the KeyDown on a picturebox?What I want is that when somebody presses the SPACEBAR the cursor has to change in the Hand-icon...and additionally do some operations when moving over the picturebox. I fact...when spacebar hasn't been pressed you can just move around the picturebox, without anything happening...with the spacebar pressed the cursor should change and you should be able to scroll the image using the mouse moving.

what I have is :

'in my global sub that loads everything, not the Main.Load, because he has to check some stuff in advance
AddHandler ACO_graph.PreviewKeyDown, AddressOf Me.ACO_graph_PreviewKeyDown
AddHandler ACO_graph.KeyDown, AddressOf Me.ACO_graph_KeyDown

[code]....

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.net - Form KeyDown Not Working?

Apr 3, 2011

Private Sub Form1_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyDown
If e.Control Then
MessageBox.Show("aaaa")
End If
End Sub

As you can see, my form will check for when the control key is pressed down.But it doesn't work. Why?

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Button After Keydown Event?

Dec 7, 2010

why does the keydown event not responding when i put a button on the form?all are set but after i put one button keydown event is not working...

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Calling Keydown From A Procedure?

May 20, 2010

I am trying to call the form_Keydown method from a procedure, CharacterJump()

Here is my

Keydown
frmGame_KeyDown(Nothing, New KeyEventArgs(Keys.Right))

What I am trying to do is after the user moves the character with the right arrow key and presses the up button to jump while still holding the right arrow key, the character will continue on moving, but the code that I put only does one movement and does not keep going.

Edit: I think I know the reason why it is only doing it once; it is because the keydown procedure is being called and therefore only executed once. The question is, how do I make it so it goes to keydown and doesn't return?

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Can Shift+F3 Be Detected With E.keydown?

Feb 7, 2012

I am running out of function keys and it will be nice if I can double up on some of them with the Shift Alt or Ctrl keys.I am using

if e.keydown = keys.F3 then{it does what it is supposed to}end if I tried e.keydown = keys.F3 AND e.keydown = keys.Shift but it gets ignored. Am I seeking the impossible or am I just missing something?Can some one tell me what I am missing or point me to an example?

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Detect KeyDown On Web Browser?

Oct 30, 2010

I have a web browser in my application. A simple one with a URL bar at the top, some back and forward buttons, the web browser component and a few other stuff. One thing I want though was a 'full screen' option. In most web browser, if you press F11 it goes full screen. I can make the web browser go full screen but I can't get the F11 short cut to work.it seems, I can only do it when the web browser component isn't focussed

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Error In Using Keydown Event

Mar 31, 2011

in my Application i have created a status strip which has three lable to show capslock status, numlock status and current date.I have used the following code, it is working perfectly when Master(MDI Parent) Load but it dosen't change when key is pressed. every time i start my application it shows the current status of the keys but dosent change when key is pressed.[code]

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Get A Keydown Even To Work In 2010?

May 18, 2010

how to get a keydown even to work but in 2010 this seems to have changed

Private Sub Form1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
If e.Keycode = Keys.Enter Then
MsgBox("test")
End If
End Sub

Apparently "KeyCode" is not in use anymore..

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KeyDown And Mousedown In Conjunction ?

Mar 4, 2012

Im currently writing a program to control a Velleman k8055 usb interface, i started by assigning keyDown and Keysup to control outputs. this worked fine, now ive added buttons to control the same outputs with MouseDown and Mouseup. however when i start to debug, the mouseup and mousedown works fine, but not the keys? is there a special code to use them with one another.

Heres some of the codes for each..

Private Sub Button1_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Button1.KeyUp
If e.KeyCode = Keys.I Then
ClearDigitalChannel(1)

[CODE]...

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KeyDown At Form Level?

Feb 12, 2011

I want to know how to do a keydown at form level. If I am not using Form Level the right way, this is what I mean. In my Form there is nothing.I want it so when the user presses a key that it will msgbox() something.As I said, there is nothing on the form what so ever No ComboBox, Button, nothing.

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Keydown Event For MDI Form?

Jan 14, 2010

This simple code works at child form, but not at MDI form.

Is there anything should I add or change?[code]...

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KeyDown Event Not Working?

May 11, 2011

I have checked my code countless times, tried other computers, and yet the keydown event will not work.

My code:Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)

If KeyCode = vbKeyRight Then
imgPerson.Left = imgPerson.Left + 500
End If
End Sub

That's all there is because I was just testing it out. imgPerson does exist, so that's not a problem.

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KeyDown Event On Another Window?

Nov 9, 2010

if I press F1 on another program like, internet explorer, it will open music. When I press F1 on my Windows Form(My program), It work fine and it play my music but when i'm on internet explorer or anything else it doesn't work and I am wondering if I can.

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KeyDown Events Not Executing?

Jul 22, 2010

I have a pong type of game and I want the spacebar to pause the game... Here is my code to detect when the space bar is pressed.

Private Sub PongMain_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
If e.KeyValue = Keys.Space Then
Application.Exit()[code]....

For some reason the application is not closing... IS there something wrong with this code that I am not seeing?

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