[2008] Stop The Counter In Keydown?
Feb 28, 2009
Public Sub TextBox3_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox3.KeyDown
counter1 += 1
End Sub
I set TextBox3 max length to 8.What code should i write if i want it to be like this:I wan the counter1 to stop increasing if the TextBox3 reaches 8 characters. (Even there's still key down occurs)After I click a button, the counter1 is able to increase again.
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Feb 23, 2011
stop do-loop with keydown
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Feb 27, 2011
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]...
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May 20, 2010
I have this code sample from a book I'm reading which looks to be incorrect:
Imports System.Diagnostics
Sub Main
Dim pc As New PerformanceCounter("PerfApp", "Clicks", False) 'excepiton here
pc.Increment()
counterLabel.Content = pc.NextValue().ToString()
End Sub
There excepion message I get is: The requested Performance Counter is not a custom counter, it has to be initialized as ReadOnly. I looked for a property to see if I can set it but couldn't find one.
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Dec 24, 2009
I have a simple application that use thread pool to read a file and input the data into a listbox. I want to be able to stop threadpool from running after clicking a stop button. How do I stop threadpool? Here is the code for my application below:
Imports System.Threading
Public Class Form1
Private Delegate Sub StringDelegate(ByVal text As String)
[Code]....
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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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Apr 8, 2012
how to remove a line?I have:
Dim PenColor As New Pen(Color.Black) and after I received the values I draw the line with:
objGraphics.DrawLine(PenColor, Xstart, Ystart, Xend, Yend)
The user can do this 10 times... (so 10 lines)...But if the user presses a cancel button, the last line drawn shall be removed (and the user can click until he is back at 0)..Would I use PenColor white here (to draw over the line)? Or is there a way to remove line directly in visual basic? I couldn't find it.
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Feb 27, 2010
What is the value of the variable named counter after the following statements are executed:
Dim percent As Double = 0.54
Dim valid as Boolean = True
Dim counter As Integer = 1
[code].....
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Apr 8, 2009
I am extremely new to visual basic and it is the first time i have ever tried to program anything. I am currently using Visual Basic 2008 Express Edition which I downloaded for free off of the mictosoft website. Anyhow, to the question at hand: I was wondering how one would use keydown commands in VB express 2008. I have looked far and wide and have yet to find an answer to this. To simplify it to a specifit answer how would I move (or rather, slide), say, a picturebox to the left of the screen by holding down the left arrow key and have the picturebox stop moving after I released the arrow key. By simply seeing how the code is I should be able to do it for any other keydowns.
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Jul 5, 2009
Well I'm currently in the middle of adding a few fine details to a program I'm busy with. Basically whats happening though is that I want to be able to delete some settings on the fly instead of individually, I also want to accomplish this through a simple key press.
Private Sub Form1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
If e.KeyCode = Keys.F1 Then
MsgBox("Do you wish to remove all entries and clear all relative data?", MsgBoxStyle.YesNoCancel)
If MsgBoxResult.Yes Then
[code]....
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Aug 31, 2011
I'm currently experimenting with a tile based dungeon crawler type game. When the WASD keys are pressed it will move in that direction, however if the key is held down it will move incredibly fast over the tiles, which is not what I want.Instead I want the player only to be able to move one tile at a time, or after each key press. Is there any way to do this with the KeyDown event or do I have to use KeyPress to make sure it only activates after each full key down & up?
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Dec 22, 2009
Under normal circumstances I am not TOO bad at trying to figure errors out. However, I can't seem to understand why I am getting the age ol' "Object reference not set to an instance of an object error" in this lil bit of code.
This is where I define my 'intTotalRecords'
Connection.Open()
Command.CommandText = "SELECT * FROM CompanyTable"
[code].....
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Mar 5, 2009
So I'm working on my webbrowser, and just managed to get the ol' tabs working for it, but how would I go about adding a shortcut like "CTRL + T"
I tried this:
Private Sub TabControl1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TabControl1.KeyDown
[code]....
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Jul 26, 2009
i recently took a look at a game i tried to put together, and decided i wanted to finish it.The game is a shooter game that creates 'walls' that the player should not be able to move into. These walls are panels, and currently, im using one keydown event to move both players. This is not a good thing, because it makes it impossible for both players to shoot and move at the same time. The player should not be able to run through the walls
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Sep 26, 2010
I try to catch the keydown event, but arrow keys don't fire this event, although I set KeyPreview = True. Arrow keys neither fire the KeyUp event. Not on the form or on any controls..
What is required to handle:
1. Arrow keydown or keyUp event with individual event handler based on mouse focus/hover (does the control have focus if mouse hovers on it, or it needs to be clicked?)
2. Mouse scroll events individually based on "mouse focus"
I don't actually need for the form... Since all the form is covered by controls.. But I need individually for different controls. Which are just buttons, labels and a chart control.
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Jul 28, 2010
i have a button and if a specific option is set (via a checkbox) then once every 5 times the button is clicked an extra event happens.I thought a counter/Integer would be the way to do it but i cant seem to get it quite right, heres my code i have in the buttonclick event:
[Code]...
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Jul 21, 2010
I have the following code which I use in another Form and it works perfectly. I copied the same code to another form, changed the controls, keys combinations, etc., but the keyboard shortcuts do nothing at runtime. None of the key combinations work, it throws no Exceptions,I put a MessageBox in the F1 KeyDown conditional, but it doesn't show. That tells me that it's not Handling the KeyDown Event.[code]
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May 12, 2009
I am trying to use the keydown/keyup events with buttons in the same project and it not working properly. I have 4 red boxes and when I press an arrow key the box should change to green according to which arrow key it corrosponds to. I have this part working fine, however only when there is nothing else in the project. When I add in say 3 buttons, Button1, Button2, Button3 and try runing the program instead of the correct red box changing to green, button outline just moves between buttons 1,2 and 3. I have tried turning tabstop off for the three buttons but that didnt work. how to read the keydown/keyup while still having buttions that can be pressed with a mouse?
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May 20, 2010
I have noticed that a form's keydown method has a slight delay the first time you hold a button. How do I get rid of it?
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Feb 26, 2009
Alright, so I'm still working on the slot machine. I have three timers all independently going for my three "wheels" of the slot machine.
My issue, is that I'm trying to make a Stop button to stop each timer one at a time, and I'm not understanding why this code isn't working. The logic completely makes sense, and the first "wheel" stops when I click the button, however, it doesnt appear to stop the other two timers.
CODE:
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Dec 7, 2009
I created a form and have the variable inputs for 4 motor run statements. Then with a start button the script starts and it is surrounded by a for next statement to loop 10 times. It works fine but if i need to stop the execution of the script with a stop button. I put the stop in a new section but of course does not work to do a motor stop. It just causes the exe to not respond till the loop is complete. Just need to be able to stop the Run1_Click button section.
Edit:I do not mind if it finishes the 4 motor run commands and then stops execution of the loop. So need to figure out a way to trigger a stop from a button on the form to stop the cycle. For the future the loop will be a variable integer input so 10 will not be the standard.
Edit::Does a ' Do ' statement sound like the thing to use? If so how and where would I place that? Have a Stop button on the form and it would stop after the 4th motor run command.
#End Region
Declare Function InitStp Lib "stp.dll" () As Integer
Declare Function RunMotor1 Lib "stp.dll" (ByVal steps As Integer, ByVal interval As Integer, ByVal direction As Integer, ByVal outputs As Integer) As Boolean
[code]....
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Oct 4, 2009
Problem Fixed. Mod please delete this thread, .
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Aug 13, 2011
I have created a small program but the code is quite big.
I have a start button that when clicked it runs the script in a private sub called start(), when it gets the the ens it calls the start() again to loop it and restart the script.
I have added a stop button, but how do i make the script stop ?
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Nov 20, 2009
I have a app that gathers and store updated data from a list of websites. My app use threadpool and each thread visits a site within the list and gathers the data. I want to create a stop button to stop/ prevent threadpool from running once it is clicked. How do I go about doing this?
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Sep 21, 2011
VB CODE
Private Sub pstart()
Dim i As Integer
[code].....
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May 9, 2009
I have a loop set up as [code]I need to know a way to break that loop at the current item it's on in the listbox (listbox1) via a button click (button8)
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May 26, 2009
I used this in VB6 to prevent my program from running twice as it sits the system tray.
If App.PrevInstance = True Then End
What code would i use in VS 2008 to prevent the program from running twice?
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Aug 7, 2011
i have made program and would like a progress bar to start at the start of the script and stop at the end of the script.
I was thinking of using a timer and haver timer.start at the beginning of the script and timer.stop at the end for the progress bar but timers use time :/
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Apr 5, 2012
I tried look online for a simple task but I haven't been able to find the answer. How do you stop a code for testing? I triedexit - only works for loops and if statementsstop - kinda works, but doesn't completely stopsend - the form disappears when it ends
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Jan 23, 2010
I have a browser object, but when I play YouTube or things that use sound and such, I want to stop it.I tired Browser1.Stop() but it just kept on working
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