Resuming Keydown If Key Is Still Down After Another One Pressed
Apr 22, 2009
Public Class Form1
Inherits System.Windows.Forms.Form
Dim ct, ctJmp, ctRgt, ctLft, wait, wait2, origTop As Integer
Dim jumping, up, down, lft, rght As Boolean
Private Sub Form1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyDown
[Code] .....
Basically what I want to do is if the player is still holding the right arrow key after the up arrow is pressed and jumping finishes, I want him to continue to run.
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Aug 20, 2011
I am running VS 2008 and building my app on a Windows 7 box. The main form/window has a KeyDown event handler as follows in it:
Private Sub Form1_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyDown
MsgBox("control = " + e.Control.ToString + ", shift = " + e.Shift.ToString + ", e.Keycode = " + e.KeyCode.ToString)
When I build it and run it within VS it seems to run fine. The messagebox appears with the state of the control and shift keys along with the key code of the key I pressed. However, if I take the executable and run it on an XP box (both using .Net Runtime 3.5) as soon as the main form opens, the messagebox appears. Basically the "KeyDown" event seems to be firing without any keys being pressed. The messagebox comes back with: "control = False, shift = False, e.Keycode = None".
How is this possible? How can the keyDown event be fired when no keys have been pressed (as is confirmed by the output contained in the messagebox?) how I can diagnose this on the XP box since it does not have Visual Studio on it?Update I tried creating a brand new project where there is only "form1" and the only code behind this is the keyDown event handler. It just opens a blank window and pops up the message box if a key is pressed. It worked as expected on the Win 7 box but when I moved the executable to the XP box, it immediately popped open the messagebox without pressing a key.
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Feb 10, 2009
I am creating a keydown event that when the enter key is pressed it performs the button1_click event. I have this much:
if e.keycode = keys.enter then
//code here
endif
I just need to know how to make it perform the button1_click event.
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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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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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Sep 12, 2011
I am using HttpWebRequest/Response to download a file. What would i need to do on the coding side to allow resuming of interupted downloads and what would i need to know from the server if it allows me to do this?
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Dec 5, 2009
I'm trying to add a new feature to some software I have developed but am having difficulty. Essentially I want to add a 'Pause' and a 'Resume' feature.I have a timer which counts down.
Private Sub Timer_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer.Tick
Dim togo As TimeSpan = mTestEnd.Subtract(Now)
If togo.Ticks < 0 Then
Timer.Enabled = False
[code]....
When the Start command button is clicked the timer starts counting down from what amount the user inputed. I've added an elseif to pause the timer and this works ok. When I click resume the although the timer text has paused the actual timer has not and continues from where the timer would be if it had not been stopped. Much like a stopwatch lap timer. Could you help me with my Else statement.
If StartButton.Text = "Start" Then
StartTime.Text = Format(DateTime.Now, "HH:mm:ss") 'Hour(Now) & ":" & Minute(Now) & ":" & Second(Now)
txtTimeLimit.Text = HourUp.Text & ":" & MinuteUp.Text & ":" & "0"
mTestEnd = Now.Add(TimeSpan.Parse(txtTimeLimit.Text))
[code]....
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Nov 4, 2011
I am trying to find a way to resume a thread after catching the AbortThreadException and calling AbortReset.
My thread is running a loop to control two motors used in a raster scan. Once the button is pressed to begin the scan, I want to be able to click a stop scan button and have the following happen:
1. AbortThreadException is thrown and caught- a window comes up asking if you really want to abort the scan. Click yes for abort, no for suspend, or cancel to continue scanning.
2. Given users answer the program responds accordingly- If cancel, then the scan should continue right where it left off and not restart.
My problem occurs in my understanding of the thread events. I am not sure how to tell a thread to wait for a button event nor do i know how to tell a thread to continue where it left off. I also noticed that the 'suspend' and 'resume' methods have been deemed obsolete and i am not sure of the alternative way of doing those actions.
The following is the code used to catch the exception and execute the task.
[Code]....
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Apr 23, 2010
i'm making my own advanced media player but theres a prob.i can open video fine.hit play it plays it...but if I hit pause then want to continue with the vid and I hit pause or play..it restarts the vid completely instead of resuming....in simple terms i want pause to pause and un pause video.[code]
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Nov 19, 2011
I'm trying to play a MIDI file in my VB.NET (VB 2010 Express) and things work well with the code from this other question here on Stack Overflow, which I translated from C to VB.However, I also need to PAUSE, while that code is only for open and stop. I edited the code like this:
Imports System.Runtime.InteropServices
Imports System.IO
''' <summary>
[code]...
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Jul 1, 2010
I want to make my form freeze for 5 seconds before it resumes to the next form.So I have a form that says : Establishing a connection....
But I don't want it to make a connection, i just want the user to think that it's making a connection.
And I then want it, when the timer reaches zero, that it would resume to the next form.
I just need the code of the timer behavior.
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May 4, 2010
I am thining of using a boolean value per each backgroundworker to flag their completion and check all of the boolean values but there should be a better way,
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Aug 25, 2010
I am developing a Windows Service in VB2008 and am in the testing stage. What I have noticed is that if I Pause it while it is busy doing something and then resume it, the process generates an error. While I am debugging this I wanted to determine exactly what the difference is between Pausing/Resuming and Stopping/Starting a service.I searched, but most results simply told me how to Stop/Start/Pause and Resume a service, a hurdle that I jumped over many years ago. Does any one know of any resources that go into detail what happens when a service is stopped vs when it is paused?From some experimentation, it seems that if I do not place any code in the OnPause and OnContinue events the Pause/Resume commands have no effect.
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Oct 19, 2011
I just had a new, last-minute idea on to take on a task, so I am running to StackExchange for quick help.
What I want to do is execute a series of methods right in a row, each in their own threads. I want the application to wait until all of these threads are completed, after which the program will resume. It also has to use managed threading (thread pool).
What quick examples could you provide to help me along the way? If it's too complex, what things should I know about so that I can Google it on my own?
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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