I would like to be able to stop a loop while executing using the ESC key.I've found a lot about using the above key from within a Form (for example, to unload it), but very little for the use of the key within a Procedure (Sub, Function) and particularly with respect of preventing a loop from carrying on execution.
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My app starts an On-Screen Keyboard process like this:
Dim PID as System.Diagnostics.Process
:
PID = Process.Start("C:WindowsSystem32osk.exe")
:
[CODE]...
It seems to work 90% of the time. However, sometimes the PID.Kill() fails because it says the process already exited. At this point the OSK is always still there on screen. Yes, I know my code should be testing to see if the process is still running before trying to kill it, but given that the OSK is still on screen..
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]....
I have written a function that gets the alexa ranking of a given url, now this function works perfectly but I want to loop through a ListView of urls and grab the alexa rank of each item (url) with my function.The code works great if I put a MessageBox in the loop to test that the function is returning a value but when I remove the MessageBox the loop does not work.I need it to loop through adding each result without a MessageBox stop in each loop.
vb
For Each Item In ListView1.Items
Dim result As Integer
result = GetAlexaRank(Item.Text)
[code].....
I have this little application that runs a SQL query works great, now I want to have a Start Button run the and display results then System.Threading.Thread.Sleep(300 * 1000) for 5 min then run again and display results and loop till I buttonstop_click. unsure if the sleep is the best method.
[Code]...
in c++ we use break statement to stop a loop what do i do in vb.net to break a loop
View 6 RepliesHow to Stop This " Like to Make a button That will Stop it from Repeat".[code]
View 3 Repliesfor x = 1 to 45
if x = 15 or x = 30 then (push a button to continue)
for y = 1 to 50
{some code here}
next
next
what i want is the loop to stop at 15 and 30 where you have to press the ok button on this form to restart the loop.
how can i stop, a process which is being used by another process in vb 2005
View 2 RepliesI have a process that i call, if it doesnt end within a certain time, i want the process to be killed and the loop to only continue after this. if i thread the timer it never tics. If i thread the process it never does as its suppose to.
Code:
Imports System.IO
Imports System.Threading
Public Class Form2
[code]....
[Code]....
As this Loops round, the answer for formula will eventually become the same as what was input, X. How can I get the Loop to stop when it has the same answer twice in a row? The counter will count how many times it has had to Loop before finding the repeated answer.
I have this program here where it is supposed to show the Fibonnaci #'s and stop at 2000, but it keeps on going past 2000. This is what I have so far.
Option Explicit On
Option Strict On
Module Module1
[code].....
I need to run a do while loop or some way of starting a search directory loop, then if a user presses another key, it will stop that current search, and restart with the next letter entered. I appreciate any help given and insight. I am basically trying an incremental search feature, but currently whenever a user types in one letter, it does a full search, then on next letter it searches again. I want it to stop if they are still typing in letters.
If SearchTextBox.Text <> "" Then
Do Until Form1.OnKeyPress 'NEED HELP HERE
Try
[code]....
stop do-loop with keydown
View 5 RepliesI have something to ask again.. I develop a program that will send bulk messages but the problem is that when I load at least 1000 emails then I want to stop the application I cannot stop it. Is there any way to stop this application without closing the form? So that i can save the file on my listview? Here is my code upon send bulk emails. [code]...
View 6 RepliesI 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)
View 5 Replieswhat is the method to tell when a user starts or stops a process? My company makes a software package that allows a tie in from vb. I want to make a package to allow me to start and stop the software remotely and to monitor when the software is running or not.Ideally there would be some sort of event in windows when the user starts or stops the software. I imagine there is some sort of way to do this with a timer, but I am sure that windows will have some sort of event process when the program starts. I have googled this and looked through the xtremevbtalk forums for this but I am not quite sure as to what keywords to use.
View 3 Repliesi've the need to close an ffmpeg conversion started in background with the vb.net process.start.I've seen that an ffmpeg could be closed by hitting the key 'q'.How can i send the 'q' key to the running ffmpeg process?
i intercept the process with this code:
Dim pProcess() As Process = Process.GetProcesses
For Each p As Process In pProcess
If p.ProcessName = "ffmpeg" Then
[code]....
I develop an appliaction which is running a process in the background. This process is "forked" from the application (I'm not using threads). The process may take a few minutes while the 'father' application is waiting to the process output, so I'd like to enhance the application with the following:
a) a "Stop" button (like in IE, FireFox) to stop the process in background
b) A status bar that displays what's going on while the process is running in BG.
how to draw a button or status bar of course... I mean how VB.NET handle with stopping or displaying while something else is running in background and how to do it.
I created 3 web browsers (the web browsers is not visible) thet refresh themselves all 2 secondsbut now the cursor change to "AppString" and return to "default"now In every 2 seconds it happening again.
View 10 RepliesI have 2 subs like below, and when I make a loop with 1000 iterations and capturePicture() in it. after 700 iterations the event is not raised anymore.
Public Sub capturePicture()
Try
AddHandler capturePic.FrameEvent2, AddressOf CaptureDone
[Code].....
i have been working on maths game program for college and have advanced to the part where i have random questions asked repeatedly.
i need it to loop 25 times as atm it keeps on going and wont stop. also i need it to count how many are right, and each question they answer they get 2 chances to get it right or the game ends.but i dont know how to do any of this. this is my code so far for the questions
[Code]...
how can I stop a do/until loop when I press button1?
View 15 RepliesI am using VB 2010 , I have a loop that takes something like 5 minutes until it's finish. I want to allow the user the option to stop it in the middle or whenever they want. There's a button which starts the loop, and after I click it the loop starts running and the button is sort of "stuck".I saw something called "background work" in the VB Toolbox, can it be a solution to my problem?
View 2 RepliesWhen I go to Debug my program (F5), the program will load, until I click on the form with the main part of code in it, and then the program freezes, although it doesn't lock up because as soon as I press stop debugging/ task manager end process, it closes fine.
I will attach the zip of the program here. The form that it freezes on is "Black Ops". Edit Due to the forum not accepting my .Zip file (Invalid file type), I will upload it to MediaFire. Download link (445kb): Click Here
I call the method GetUrl below provided in a form-based assembly from a console application to get the content of an HTML page. This works fine so far with one exception. The code starts an iexplore-process in the background and this process remains active even after fnishing my program. The only way I found to get rid of this process was to kill the process, but this seems not be be a very nice and mature solution. I already read that the NET webbrowser control in only a wrapper for an activeX COM control of IE.
Question: How can I close the newly created iexploe-process in a clean way using the webrowser object?
[Code]...
I am fairly new to VB but really enjoying programming. I'm looking to create a counter that counts to 25 and loops back around again with a button control and another button control to stop it. So I press a button to start and another to stop and I want it to display the number it stopped on. Is this possible? and how do I do it if it is? I can figure out how to display the label and create a simple counter(that doesn't loop), but I'm unsure on the rest.
View 2 RepliesI want to make a loop that only loops if the serial link is open and Button3 (which writes a stop signal to the program) is not pressed. I've gotten as far as this: Do While Serial.IsOpen = True & Button3. but do not know how to tell the while loop to stop when Button3 is pressed.
View 2 Repliesany way to stop a for loop untill i have user input, once the input is correct continue the for loop, is that possible at all?
View 4 RepliesI'm foolin round with stream reader/writer and I'm running into this problem: If I have my if/then statement inside my loop I get a million msgboxes(which I understand why), however if I put it outside my loop, and the if/then returns a false then the whole program freezes up. I can't move my mouse around, I can't click on any objects, ect. Here is what I'm using:
[Code]...
