Accidental Clicks
By Richard Rost
2 years ago
Avoid Accidental Clicks in Your Microsoft Access Forms In this Microsoft Access tutorial you will learn how to prevent accidental clicks and double-clicks on your forms to ensure actions like printing a report run only once. Learn to use VBA, simulate long processes, and utilize TempVars and DoEvents to create a more user-friendly application. Felix from Peoria, Arizona (a Platinum Member) asks: How can I prevent a user from accidentally double-clicking a button that should only be clicked once, such as a Print Report button? I want to ensure that the action stops after the first click. I've got a lot of users (myself included) who accidentally double-click on buttons and send down 2 copies of a 13-page report. Happens a lot. MembersThere is no extended cut, but here is the database download: Silver Members and up get access to view Extended Cut videos, when available. Gold Members can download the files from class plus get access to the Code Vault. If you're not a member, Join Today!
PrerequisitesLinksRecommended CoursesCode Vault
Keywords TechHelp Access, prevent accidental clicks Microsoft Access, prevent double-clicks Microsoft Access, single-click action Microsoft Access, VBA prevent double-clicks, prevent multiple report prints Access, Access form button click prevention, disable button after click Access, tempVars prevent double-clicks, disable button VBA Access, button enabled false VBA Access, prevent duplicate actions Access
Intro In this video, I will show you how to prevent accidental double-clicks and redundant actions on buttons in your Microsoft Access Forms using VBA. We will cover how to simulate a long-running process with a sleep timer, use tempVars to track processing states, and demonstrate how to disable buttons during processing to stop multiple clicks. You'll also see how to implement counters for tracking, make use of the doEvents function, and ensure your forms only process one action at a time for improved reliability.Transcript You know it's happened to you at least once in your life where you accidentally double-clicked on something instead of just clicking on it. And you know, you double-click on a button that you should have just clicked on once and now it happens twice like printing a long report.
So in today's video, we're going to talk about preventing accidental clicks and double-clicks in your Microsoft Access Forms. Today's question comes from Felix in Peoria, Arizona, one of my Platinum members. Felix asks, how can I prevent a user from accidentally double-clicking a button that should only be clicked once, such as a print report button? I want to ensure that the action stops after the first click. I've got a lot of users, myself included, who accidentally double-click on buttons and send down two copies of a 13-page report. Happens a lot.
Yeah, this has happened to me a couple of times, too. I used to have this end-of-month report that I'd run in my own database, and it involved action queries, like an Append query and some other stuff, importing. And once in a while, I would accidentally double-click on it, and it's like a two-minute process. And so I'd be like, ugh. All right, so how do we prevent that from happening?
First up, some prerequisites. This is a developer-level class, so you're going to need to know a little bit of VBA. So if you've never done any VBA programming before and you want to learn how, go watch this video first. It's about 20 minutes long and it will teach you everything you need to know to get started programming in VBA and Access.
Okay, so here I am in my TechHelp free template. This is a free database you can download a copy off my website if you'd like to. You'll find links down below. And in here I've got a little button that just says, Hello World, and it puts Hello World in the little status box. That's all that guy does.
But let's reprogram this button and we're going to pretend that this button launches some long event, like printing a big document or running a big append query or an import or something like that. Now, I'm just going to simulate that event by using a sleep timer. I'm going to make the system just sleep for one second and that will be enough for us to see that multiple clicks are happening.
Now if you downloaded a recent copy of this in the global module here, you will find a copy of my sleep function. It's right here, sleep sec, and we declare it right there. That's where we get the sleep function from. I got a whole separate video that explains this thing and how it works. You'll find a link to this video down below.
All right, so let's reprogram this button so it does something and just so we can see how many times the button click actually registered, let's turn this box into a counter. So we can see every time that the event runs, we'll just increment the counter one. So let's just rename this here counter. The box itself, let's go to all. I'm going to rename the box to counter. Let's get rid of the control source and get rid of the format and I'll set the default value to 1. So when the form opens up, that will have the value 1 in it.
Now the button itself, I'm just going to put on here print or whatever. We can leave it Hello World button, that's fine, that doesn't matter. Save that. Now let's go into the button, build event and instead of status Hello World, I'm going to say counter equals counter plus 1. We're just going to increment that counter variable. That's all that's going to do. Right? So come back out here, close it, open it back up again, click the button, it goes to two. Click it again, it goes to three.
Now, you've all seen this before. If you haven't done it yourself, I'm sure you know someone who has. I used to teach Windows basis classes in the classroom and all the time I would tell people, no, just click on the icon and they would double click and you can't fault them. If you're new to computers and I used to teach a lot of newbies, it takes a while to get the concept of a double click and even if you're an advanced computer user like myself, I accidentally double click on something. I just did it this morning.
So what we want to do is we want to intercept that second click and stop it from happening. The only way we can really do that is to make the button know if it's currently being used. We're going to set a variable and say, hey, hold on. I'm in use right now. I'm unavailable. So if a click happens, just ignore it.
Now the first thing we're going to do is we're going to simulate a long process happening. So what I'm going to do is use a sleep in here. I'm going to say sleep 1,000. Those are milliseconds. So it's going to sleep one second between clicks. And that will give us the opportunity to see what's going on there. Save that, come back out here.
Now if I click, you'll see there's a delay and then it goes to two. Click again, a delay, and it goes to three. Even if I double click, watch this, click, click, four, five, it's still getting that next click. One, two, three, I just clicked three times, six, seven, eight. So we have to intercept that somehow.
All right, and the way to do that is back in the code, we're going to set a variable that is going to know that this particular button has just been clicked. It's processing something that's already started. Now, there's a couple different ways we could do this. We could use a form field. We could use a global variable. We could use any number of different ways to do this. I'm going to use a temp var because I love temp vars. And if you don't know what tempVars are, talk to Adam.
Now, tempVars are basically just system memory variables that have a lot of benefits to them. I like to use them a lot. Go watch this video if you want to learn more about them. So right here, I'm going to say tempVars isProcessing equals true, okay? And then when the event is done running, I'm going to say it equals false, okay?
Are you with me so far? Now, when we first come into this, I'm going to say, if tempVarsIsProcessing equals true, then exit sub. In other words, when you first come in here, if this is true, just leave. Don't do anything, okay?
Now we should initialize this temp vars somewhere. Normally temp vars for Boolean types will be initialized to false. Long integers default to zero. Strings default to an empty string, but I don't like relying on that, so I'm going to initialize this to false when the form loads. All right, so I'm going to find the form load event, and when the form loads, we're going to set it to false.
In other words, it's not processing when the form first loads and we've made sure that the value is set to false. Now why can't we just use a regular variable in here? Well, it has to be at least a form level variable. We could declare a variable out here. That would work or you could use something called a static variable. There's all kinds of different options. I like tempvars. And yes, I've got videos for global variables and static variables and all that different stuff. You'll find them on my website if you want to learn more.
All right, so let's save our work. Let's give it a debug compile. Always good to do once in a while. Debug compile, make sure there's no syntax errors. Come back out here, hit the button again. Okay, I got a nine. Let's double click it. Click click. Ten, eleven. Okay, alright, hang on. Click click. Twelve, okay, so what's happening? It's still registering twice. What happened here? It's not checking to see if it's equal to true and exiting sub.
Well, the problem is that while the code is running, it can't stop to check anything else until the code is done executing. So what happens is it runs this, it runs this, it goes through this, it does this, sets it to false. And as soon as it exits back out again, your second click processes. And it starts the process all over again. So we need some way in here to interrupt that. We need some way to say, okay, when you're done sleeping, alright, but before you set this to false, I need you to go out and check to see if any other events want to run. Go out and check to see if, you know, some other form wants to do something or if the user happened to click.
These are all things that we can check for with doEvents. doEvents says, I'm going to hold on for a second, you do whatever else you got to do and then I'll finish doing what I was doing. What will happen is doEvents frees up the system for your second click to start processing. Once that second click processes, it's going to come in here and say, are you busy? Oh, yeah, you're busy because we haven't set up the false yet. See? So it comes back in here, says you're busy, exits out and doesn't process that click. Makes sense? You following me? doEvents is like going, all right, what do you want to do? Okay, and then it goes and does it.
All right, so save that. Now, if I come out here and I go click, click, I only get one. Now, let's set this back to one so we can see it's easier. All right, so that's one. I'm going to go click, click. I just double-clicked. It goes to two and it stops. Why? Because as soon as it got to this spot here, it freed up the cycle so that the processor could go and run any other events that wanted to run. Alright, it grabbed that second click out of the buffer, re-ran this module, a second copy of the module basically ran, right, that's what doEvents kind of does, and the first thing it processed was this and it says, are you processing? Yeah, the other module, the other copy of the module was processing. So it exited out of the second click, then it comes back to the first click, now it can free up and say, I'm done processing. See how that works? It's tricky. It's all about learning how these processes run.
Another thing you could also do if you want the user to visually see that they can't click a second time is what you could do is like right here after the counter, you could say, make the button disabled. So say, hello world button dot enabled equals false. That will make it grayed out. Okay, and then I would throw another doEvents here so it updates the screen. Okay, so your counter will increment, the button will get disabled, the user will see that, the process will run, doEvents will run again and free everything up and clear that variable and then it will exit out.
And if you want to re-enable the button after that, you can or you can just leave it disabled. If you want to make it so that you got like a big report and you don't want the user printing it a second time, you could force them to have to exit the form and then come back in so the button's enabled again. That's up to you or make a second button to unlock it, whatever. I think this works just fine.
So save this and back out here. I'm going to close and reopen it just to make sure everything is cleared. All right, ready? I'm going to double-click now. Double-click. See? It disabled the button, which you could visibly see, and it didn't run my second click. Let's do it again. I'm going to click three times. Click, click, click. See? It disabled the button, and it only processed one of those.
All right, I turned mouse click effects on in my software. Let's see. Click. All right, I'm going to double-click now. Click and a double-click now they only click once; I'm going to click three times and I only did one, see? I'm going to turn that off. I personally find those mouse click effects annoying. I don't know, what do you think about those? When I watch other tutorials and people have these, you know, mouse halos on and the click events and I find that distracting myself. I don't know. Do you like that? What do you think? Post in the comments down below and let me know what you think. All right. I turned it all back off. That's how I like to do it. Alright.
So there you go. That's how you disable the button, clear that event, and you only get one click out of that button no matter how many times the person clicks on it. Unless they happen to click before, you know, if they click while the process is just finishing, they might get that second click. You could add an additional sleep timer in here. So even after, let's say, this is your print event. You could add another second or two second pause down here before you set that temp var to false. And that will give them a buffer, maybe put like a five second pause in there, I don't care. That way, you know, in case they do click longer or multiple times, it will still eat up that time. Up to you.
All right, I give you the Legos. You can play with them, build however you want. Do you like this stuff? Do you like learning with me? I got lots and lots of lessons on my website, folks. Tons and tons of them. Hundreds of hours of videos. And they're all arranged in a nice, orderly fashion. You know, level one, level two, level three, in the order that you should learn them. Okay, so check them out. You'll find a link down below. And yeah, it's cool stuff. And we have a lot of fun so that's gonna do it folks that is your TechHelp video for today I hope you learned something live long and prosper my friends I'll see you next time.
A special thank you and shout-out to our diamond sponsor Juan Soto with access experts software solutions. They're manufacturing experts specializing in Microsoft Access and SQL Server. Juan is a 13-time Microsoft Access MVP. Check him out at accessexperts.com.
TOPICS:
Preventing accidental clicks and double-clicks in Microsoft Access Forms
Using VBA programming for Access
Creating a sleep timer in VBA
Using a global module in Access for a sleep function
Simulating a long event with sleep timers
Implementing a counter in Access forms
Using tempVars to manage button click states
Setting tempVars values in VBA
Using the doEvents function in Access VBA
Disabling buttons during processing in Access
Re-enabling buttons after processing in Access
Debugging and compiling VBA code in Access
COMMERCIAL:
In today's video, I will show you how to prevent accidental double-clicks on buttons in your Microsoft Access Forms. Felix from Peoria, Arizona wants to stop users from unintentionally sending multiple prints of a long report by double-clicking. We'll start by simulating a long process using a sleep timer, then introduce the concept of tempVars to control button state. I'll demonstrate how to use VBA code to intercept additional clicks and disable buttons during processing. You'll learn how to efficiently manage button clicks to prevent redundant actions. You'll find the complete video on my Youtube channel and on my website at the link shown. Live long and prosper my friends.Quiz Q1. What is the main problem addressed in the video?
A. Redesigning user interfaces in Microsoft Access
B. Preventing accidental double-clicks on buttons in Microsoft Access
C. Printing large documents from Microsoft Access
D. Managing SQL Server databases with Microsoft Access
Q2. Which language is required knowledge for following the tutorial?
A. Python
B. JavaScript
C. VBA (Visual Basic for Applications)
D. C++
Q3. What is the purpose of the sleep function in the tutorial?
A. To delay the form loading time
B. To simulate a long event happening, like printing or running a query
C. To permanently disable a button
D. To initialize the form controls
Q4. What is the purpose of the tempVars variable in the tutorial?
A. To store user credentials securely
B. To manage user interface settings
C. To track whether a button is currently being processed
D. To control form appearance
Q5. What does the "doEvents" function do in the code?
A. It stops the execution of all code
B. It checks system events and processes pending events
C. It disables all form controls
D. It initializes variables used in the form
Q6. What initial value should the "tempVars isProcessing" be set to when the form loads?
A. True
B. Null
C. False
D. 0
Q7. What happens if the button is clicked while it is already processing, according to the tutorial?
A. The system crashes due to an overflow error
B. The click event is ignored and nothing happens
C. A message box appears asking the user to wait
D. The process restarts from the beginning
Q8. How can the user visually see that a button is processing according to the tutorial?
A. By changing the button's label text
B. By disabling the button using `buttonName.Enabled = False`
C. By changing the button's color
D. By displaying a message box
Q9. What is the purpose of adding an additional sleep timer after the main process in the tutorial?
A. To refresh the form's display
B. To add extra processing time for fun
C. To provide a buffer time to avoid processing multiple clicks
D. To ensure the button remains disabled permanently
Q10. According to the tutorial, what should be done just before the form load event?
A. Enable the button
B. Reset the form controls
C. Initialize the tempVars to False
D. Compile all the VBA code
Answers: 1-B; 2-C; 3-B; 4-C; 5-B; 6-C; 7-B; 8-B; 9-C; 10-C.
DISCLAIMER: Quiz questions are AI generated. If you find any that are wrong, don't make sense, or aren't related to the video topic at hand, then please post a comment and let me know. Thanks.Summary Today's TechHelp tutorial from Access Learning Zone focuses on a very common issue that many Access developers and users encounter: preventing accidental double-clicks on buttons in Microsoft Access forms. Whether you're new to computers or have lots of experience, everyone has double-clicked a button at some point when they meant to click only once, sometimes resulting in unintended consequences like sending duplicate print jobs or running the same process twice.
The question for today's lesson comes from someone who wanted to ensure that users do not accidentally double-click a button meant for single actions, such as printing a long report. The idea is to make sure that when a button is clicked, the associated action runs only one time, regardless of how many times the button is pressed.
To follow along with this lesson, you should have some familiarity with VBA in Access. If you are new to programming with VBA and Access, I recommend watching a beginner video first to get started with the fundamentals.
For demonstration purposes, I used my TechHelp free template database. This free template is available for download from my website if you'd like to follow along directly with the examples. Inside, there is a sample button that initially places "Hello World" in a status box. I repurposed this button for the lesson by having it simulate a long-running process, which could be anything from printing a report to running an append query or importing data. To mimic this in real time, I implemented a brief sleep timer, set for one second, using a helper function available in the global module of the template. If you want to learn more about how the sleep timer works, you'll find that video on my site as well.
To make it even clearer how often the button's event runs, I turned the status box into a counter. Each time the button is pressed, the value increases by one. This allows us to easily see whether multiple clicks are being handled.
It's important to understand that accidental double-clicking happens for many users, no matter how experienced they are. Sometimes it's just muscle memory from working with other Windows programs where double-clicking is standard, and other times it happens purely by mistake. Regardless, the goal is to intercept that second click and have the button ignore it while the first action is still processing.
The approach I recommend is to make the button "aware" of whether it is currently active or processing a request. To achieve this, I used a temporary variable (tempVar) to track the button's state. A tempVar allows us to store a flag in system memory to indicate whether the button is currently running an action. If the value is set to true, any additional clicks are ignored. Access provides several ways to store flags like this, but I am partial to tempVars because of their flexibility and scope. If you want more information on tempVars, I have additional resources on my website.
During the form's load event, I set this tempVar to false, ensuring that the button is initially available. This avoids relying on default values and ensures consistent behavior.
You might wonder why I didn't use a standard variable. While you could declare a variable at the form or module level, tempVars offer a reliable way to share state between different events and processes within Access. If you're interested in learning more about other types of variables, such as global or static variables, you can explore those topics further on my website.
After reprogramming the button to check the tempVar before running its process, I discovered an important detail: even with the flag set, subsequent clicks could still sneak through. This is because, in VBA, code execution within an event handler does not get interrupted until the handler finishes. If the user manages to click repeatedly while the first process is still running, those clicks can queue up and run after the action resets the flag.
To overcome this limitation, I introduced the use of the DoEvents function. This function tells Access to pause momentarily and process other pending events, such as additional mouse clicks, before continuing. By placing a call to DoEvents at the right spot in the code, Access recognizes the additional click, runs any pending events, and since the tempVar is still indicating the button is processing, those extra clicks will be ignored. The end result is that only one action occurs, no matter how many times the user tries to click the button while it is busy.
Further improving the user experience, I demonstrated how to disable the button visually by setting its Enabled property to false while it is processing. Adding another call to DoEvents ensures that Access updates the user interface, giving users clear visual feedback that the button is unavailable. Once processing is complete, you have the option to re-enable the button, or you can leave it disabled until some other condition is met, such as reopening the form or clicking a separate unlock button.
With this setup, you can reliably prevent accidental double-clicks from running multiple instances of your process. You can even introduce a buffer or extra delay after the main processing if you think your users might continue clicking frantically, giving the button more time to recover before it's re-enabled.
As always, I encourage you to take these concepts and adapt them to your own needs. My website is filled with a wide range of video lessons that guide you step by step through not only this sort of button control, but many other topics ranging from beginner to advanced. They're all organized in a sequence that builds your knowledge as you progress.
For a complete video tutorial with detailed, step-by-step instructions demonstrating everything we've covered here, visit my website at the link below. Live long and prosper, my friends.Topic List Preventing accidental double-clicks in Access forms
Simulating long events with a sleep timer in VBA
Implementing a counter to track button clicks
Using tempVars to manage processing state
Initializing tempVars on form load
Intercepting repeated button clicks with tempVars
Employing the doEvents function to handle events
Disabling buttons during processing to prevent multiple clicks
Re-enabling or permanently disabling buttons after use
Adding a buffer time after processing to absorb extra clicks |
