Determine If Any Keyboard Key Is Pressed?
Mar 3, 2012
I have a few problems with my VB.NET project. I am making an application that should track every key inputted by the user. This may sound scarily like a keylogger, but it is intended for statistics purpose only. All data is stored on the client's computer and will not be sent anywhere on a network or the Internet.
The problem is actually figuring whether or not a key is pressed globally. That means, not in a KeyDown, KeyUp or KeyPress event. Let's say if the user inputs anything in Microsoft Word, my application will notice.
I have already tried this code. It gives PInvokeStackImbalance errors in the MDA. It has actually worked out for another application I am making, until I figured the severity of this error.
Private Declare Function GetAsyncKeyState Lib "user32" (ByVal vkey As Long) As Integer
Private Sub CAKS(ByVal Key As Long)
Dim WasBeingHeld As Boolean = False
[Code]....
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Nov 7, 2010
This may sound like a dumb question but I need to know. I know you can tell which keys are pressed on the keyboard but I like to know if I can do something.Ok, heres what I am trying to do. A user is in another program that is max on the screen. He has to press Print Screen to take a screenshot, but he got to min the screen he is in to paste the screenshot into paint. This causes slow loads on maxing that screen and sometimes crashs of the program. I already got the code done to check when the program is running and to capture the screenshot and save it. What I to do now is, find out while in the other program with my program running in the background, if the user has pushed the Print Screen button.
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Jun 21, 2010
What I'm trying to do is get the form to catch any key on the keyboard that has been pressed so it will reset a timer?
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Feb 2, 2010
I know how to send keys using Sendkeys.Send("{RIGHT}") I even know how to use Send keys In a timer, to repeat the key press... But it's just a key press, and it lets the key up. So If I tried to put sendkeys.send("{RIGHT}") under a Timer, then it will press/release the Right Key. I don't want that. I want to HOLD THE KEY DOWN. Here's Some Code, that I know how to do that Simulates a Mouse Click, Left Down, AND Left Up. Mouse Click. Ok...? So here's some example code of how to Send a simulated Mouse Click.
EXTREMELY EASY, BUT EXTREMELY POWERFUL CODE. Simulated Mouse Clicking.
Public Class Form1
'To allow to detect keyPresses. latter on in your code.
Private Declare Function GetAsyncKeyState Lib "user32" (ByVal vKey As Long) As Integer
[code]....
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Jun 4, 2010
i am trying to create a programme whereby when a hotkey is pressed, a keyboard key spams automatically .for e.g , i press F10 and the letter "Z" spams..i know i need to add in a timer , and I added two buttons for the function of start and stop . after that , i added in the hotkeys and then i am stuck in adding the code for the automatic spamming of the particular keyboard letter.i found out how but it is only when i click a textbox then it would spam . here is my code. i need it to work in a certain game . like auto loot [code]
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Jul 24, 2009
I am developing a software for musical trainning. By now, the user can only use the keyboard of PC. I want use also a music keyboard/digital piano.There is a code that get information of what key was pressed? For example: the user press the B note (not the letter B), and the software recognize this. Remember: I am not talking about PC keyboard, I am talking about music keyboard.
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Aug 14, 2008
How can I set a button, so that when it is pressed, it stays in the pressed down graphic state. Then when pressed again it returns to the normal not-pressed visual.Make a button stay like this until pressed again: url....
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Oct 17, 2011
I have a TextBox and set the MiltiLine property to true and AcceptsTab property to false.When the TextBox has focus and i press Tab it works fine and the next control get the focus, but when i press Ctrl+Tab it works as if AcceptsTab property is set to true and makes a tab character into the TextBox.The reason i press Ctrl+Tab.. when switching between forms in my MDI application.Now how to make a Ctrl+Tab when pressed works like Tab when pressed in a MultiLine TextBox?
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Oct 13, 2010
I have created a virtual keyboard like the "Windows onscreen keyboard". So, I have used the method sendkeys.But if I click on the button, it doesn't write nothing.
I think I have a problem with the FOCUS.As you can see, the "Windows onscreen keyboard" is always on top.This doesn't happen to my form. How can I do?
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Jan 4, 2010
oke On-Screen keyboard through my VB code. I am using windows 7 and below code to open the keyboard. Everytime when i run this code i am getting error "Could not start On-Screen keyboard".e to fix this error?
Dim proces As New Process
proces.StartInfo.UseShellExecute = False
proces.StartInfo.RedirectStandardOutput = True
[code].....
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May 5, 2011
Private Sub ContextMenuStrip_ForDisplay_Opening(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles ContextMenuStrip_ForDisplay.Opening
If Utility.IsKeyDown(Keys.S) OrElse Utility.IsKeyDown(Keys.V) Then
[Code]....
I do the above to cancel the menu if S or V is pressed.
I'd like to cancel if ANY key is pressed.
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Mar 21, 2010
i have a pocket pc that have some special keys and i need detect when a key is pressed in my program. how can i detect the keys that is pressed? i have tested in a textbox change function the box detect all keys except that special keys there is some api to look for alk keys thats is pressed in pocket pc?
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Mar 31, 2011
I need to check if the SHIFT or CTRL keys are being pressed in my VB.net application? (get a boolean)
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Feb 4, 2010
How would I check if a key is currently being pressed?
Also how would I detect if a key is pressed without using the KeyDown event. The reason I am not using the keydown event is when the user holds down a key it calls the event, waits a second than keeps calling it. I do not want the wait period if a user is holding down a key.
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May 20, 2011
All i wish to do is have some simple code, which can detect when the esc key is pressed, (if possible can you point out where i need to change to set it for an other key).
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Feb 14, 2010
How do I find out if any key is pressed during a certain time?i have a timer to the "certain time" is no problem.But how do I find if any key is pressed?
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Jul 1, 2009
I'm looking for a way to find when no key is pressed. I'm creating a game and I have an animated characted. When you press the movement keys he moves and is animated. I need to know when no keys are being pressed so I can tell the animation to stop.
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Aug 6, 2009
How do i get if a Key is pressed on the whole form. Like A? or Ctrl + A
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Jan 27, 2010
'pressing F1 key on main form. I dont know how to trap whether user pressed F1 key or not
Private Sub frmMain_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
Dim KeyAscii As Long = Asc(e.KeyChar)
[code]....
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Oct 25, 2010
How to make a key being pressed do something?If 'w' is pressed, then...
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Mar 30, 2012
So i just wrote this awesome program, but now it doesn't run when I try to! When I press F5, or press the run button, this error happens:
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Oct 18, 2009
I want to make it so that if the key 'shift' is pressed it does something. I have this VB.Net
If Keys.Shift = 1 then
MessageBox.Show("pressed shift")
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May 25, 2009
I have a webform and i want to detect if F5 button was pressed or if the page was refreshed. I know about postback but it is not what i'm looking for. I have a gridview that loads in a modal popup when a button is clicked and a parameter's value is set for the gridview. When refresh is hit and if the modal popup button was previously clicked the modal popup is visible right after refresh. I want to detect if the page is refreshed to prevent this. any ideas? I thought to try Override but I'm not exactly sure how to use it. I tried Control.ModifierKeys but I don't have access to ModifierKeys.
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Mar 6, 2010
How can I check if a perticular button was pressed first?
I need something along the lines of:
if btnNewGame.wasPressedFirst then
do this
else
do this
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Apr 10, 2011
How do I check if Control + Z is being pressed?
I managed to check for when one key is being pressed, but apparently I can't check for two at the same time.
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Apr 8, 2011
Private Sub Form1_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyDown
What is the keyValue I need for checking for the DELETE key using e.keyValue?
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Apr 14, 2010
Im doing a small project in visual basic which involves lighting up leds through the parallel port and turning them on and of. each led is controlled by a checkbox on my form and they only come on when the checkbox is checked.
what code do i need to use to have the checkbox checked when a key is pressed but when the key is released the checkbox is unchecked i have already tried keydown which will check the box when a key is pressed but will not uncheck it when the key is released
If e.KeyValue = Keys.A Then
CheckPin1.CheckState = CheckState.Checked
ElseIf e.KeyValue <> Keys.A Then
CheckPin1.CheckState = CheckState.Unchecked
End If
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Nov 8, 2011
I am making a Tetris program and I have a 2d array 10 by 20 for the grid.I want the Tetris blocks I have created to move down one block every second unless the user presses "a" or "d" (to move left or right) then the block should move left or right whilst moving down.The problem is that I have created a loop for it to delay a bit but then it waits for the user to press a key until it continues the program. So the block will stop moving down and just stay where it is until they press something.I have been told that you can do this in C with something like if keyboardhit or kybd() or something then it will read the key but otherwise it will just skip that bit and loop round. So how can I do this in VB?
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Feb 24, 2012
How can i count keys pressed within ex. 1 min? Or how do i count a spesific key?
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May 25, 2012
how can I check with getasynckeystate, if ctrl+c was pressed?
getasynckeystate(17) and getasynckeystate(67) doesn't seem to work
even getasynckeystate(17) and getasynckeystate(67) and &H8000 doesn't work too
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