• 0

[VB6] Exit Application


Question

Hi,

I have written a VB6 application, and want to exit it if a certain condition happens. All my code gets called from the Form_load event and the form it self is never shown. I tryed using "unload me" or "unload form1" but that didnt work.

So what command would I use in VB6 to close the application?

thx in advance!

Link to comment
https://www.neowin.net/forum/topic/338146-vb6-exit-application/
Share on other sites

10 answers to this question

Recommended Posts

  • 0

Actually a Form Unload or "End" command during the Load event can cause problems and/or simply not work so...

declare a module level variable

Private mbUnload as Boolean

Sub Form_Load

If Conditions_Met Then

mbUnload = True

End if

End Sub

Sub Form_Activate

If mbUnload = True Then

Unload Me

End If

End Sub

  • 0

sweet, it worked when I put the unload me in the Form_Load. Why doesnt it work when I put it in a different sub though?

I was reading something about End before, but it sounded kinda negative and that it shouldnt be used... ?

I actually solved my problem too by using a module instead of a form and by using the exit sub command in the last sub that gets called.

still thx guys:yes:!

  • 0

<sigh> I just know I am going to regret posting this but...

"End" is the proper way to completely stop an application becuase, often, application are more than just Forms, and often do not include Forms at all. Simply doing an Unload on all Forms will not nessasarily destroy all objects (classes, references, etc).

Although Unload is not bad, it is not complete.

(please take this message as it was intended, to inform, not inflame)

Sincerely,

James Rose

New York City

  • 0
  jameswjrose said:
Simply doing an Unload on all Forms will not nessasarily destroy all objects (classes, references, etc).

586138573[/snapback]

Err, why would you regret posting it? I'm just curious--to the best of my understanding, if you unload all the forms, won't the application be closed anyway by the system? I understand that a VB app is often more than just forms. But, according to MSDN, in the documentation for the End statement:

  Quote
For normal termination of a Visual Basic program, you should unload all forms. Your program closes as soon as there are no other programs holding references to objects created from your public class modules and no code executing.

The other resources (classes, references, file handles, etc) should be reclaimed by the OS once your application terminates, right?

  • 0

See, that's the thing, the Garbage collector in VB6 runs when a function/procedure ends (as opposed to .Net which runs at rather random intervals, or you can call it specifically, but this is another issue)

Say you had an app with one Form and one Class. Say the class is created when you load the form. The class SHOULD be destroyed when you unload the form. However this is not always the case. The End command makes sure ALL references are destroyed. The reason for this importance is that if your app is started again, is is possible (however unlikely) that the previous values from the original class will still be in memory.

In fact, we had a VERY similar situation about class destruction in our app just this month. (I have NO idea how the values were not being cleared but....)

End will guarentee that all memory will be cleared.

This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Posts

    • From what I understand, RAID 1 makes a copy of one disk. How does it do this? If something happened to one drive, could I take the other one out, plug it into a PC and use it like a normal disk? I have two hard drives that have the same information on - a bit of protection if one drive fails. But I've just been manually copying the data twice.
    • Microsoft SharePoint gets Modern Page Templates to speed up page creation by Paul Hill SharePoint, Microsoft’s enterprise content management solution that allows organizations to set up internal pages and share documents, has just got a big update with the new Modern Page Templates. Microsoft said that it’s going to be rolling out the feature to customers globally between early July and early August. Organization members that want to set up pages on SharePoint using the new templates can do so from multiple entry points including the Site Home (the home of a Communication or Teams site), App Bar (the persistent navigation pane on the left of SharePoint), and the New Web Part (a webpart that displays and creates news posts directly on pages). By giving colleagues multiple access points to the new templates, there’s more chance they’ll be found and used. By including plenty of swanky templates, Microsoft is making it so you can spend less time designing pages, and more time filling them with content that really matters. If you want to create a new page using the templates, just go to New > Page and select a template “From Microsoft”. If you were making a news post, you would go to New > News post then you’d be presented with the new Template Gallery where you can select a custom template created by your colleagues under “Saved on this site”. While these new templates are coming to customers globally next month, Microsoft is already busy working on new features to make templates easier to discover and make them more useful. For example, it is building tenant-wide custom templates that can be published across sites for organization-wide use, and it’s working on Copilot templates that you can use when creating pages with Copilot. Neither of these features was given a release timeline. Customers won’t need to do anything to start using Modern Page Templates as they’ll be available automatically as it rolls out worldwide across tenants. For those who want to dive deeper, Microsoft will be publishing additional documentation and guidance about this feature soon.
    • Times are changing: https://arstechnica.com/gaming...ndows-11-ars-testing-finds/
    • Unless there is “bug” that all of a sudden sends your messages to Meta. Where have I heard this before?!
    • Maybe, just maybe... and it isn't you... there are some people who like the Windows 11 UI (for whatever reason) and want a better backend.
  • Recent Achievements

    • Week One Done
      pcdoctorsnet earned a badge
      Week One Done
    • Rising Star
      Phillip0web went up a rank
      Rising Star
    • One Month Later
      Epaminombas earned a badge
      One Month Later
    • One Year In
      Bert Fershner earned a badge
      One Year In
    • Reacting Well
      ChrisOdinUK earned a badge
      Reacting Well
  • Popular Contributors

    1. 1
      +primortal
      539
    2. 2
      ATLien_0
      205
    3. 3
      +FloatingFatMan
      168
    4. 4
      Michael Scrip
      150
    5. 5
      Som
      126
  • Tell a friend

    Love Neowin? Tell a friend!