[RESOLVED] Form remains visible after it has been unloaded

I have this code for a menu in my main form:

VB Code:

Private Sub mnuProcessData_Click()
    'Load a from where some math calculations
    'are performed on a large array of data
    frmDataProcess.Show 1
    'After the processing, the processed data
    'which were plotted on a picturebox must
    'be replotted as they have changed
    UpdateEverything
End Sub

In frmDataProcess is a 'Close' command button which unloads the form so control is returned to the main form and sub UpdateEverything which is fairly time-consuming takes over.
It works well, but after I click on 'Close', frmDatProcess remains visible for awhile, which I don't like. Any ideas to avoid this?

If your routine is taking a while to complete, then maybe through in a DoEvents to let the OS finish closing the form.

Just a guess.

Maybe a 'DoEvents' may help....

It didn't, but the thing is sub UpdateEverything is calling various other subs which in turn call other subs which... and I have yet to find out which ones have the most time-consuming loops.

Would hiding it work better?

Quote:

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Originally Posted by Hack

Would hiding it work better?

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Nope.

You could try putting frmDataProcess.Show 1 AFTER UpdateEverything. This may mean the form will take a while to show up though as UpdateEverything will have to execute. Maybe the problem is on frmDataProcess itself?

Quote:

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Originally Posted by RickyOswaldIOW

You could try putting frmDataProcess.Show 1 AFTER UpdateEverything. This may mean the form will take a while to show up though as UpdateEverything will have to execute. Maybe the problem is on frmDataProcess itself?

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UpdateEverything must be called AFTER frmDataProcess has been loaded and used to modify the data. Otherwise there's nothing to update.

Well, we are kind of running out of ideas here, so I guess I will go back to the original question.

How long does it stay visible and what kind of impact does this have?

Add DoEvents before calling UpdateEverything.

Code:

---

Private Sub mnuProcessData_Click()
    'Load a from where some math calculations
    'are performed on a large array of data
    frmDataProcess.Show 1
    DoEvents
    'After the processing, the processed data
    'which were plotted on a picturebox must
    'be replotted as they have changed
    UpdateEverything
End Sub

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That has already been suggested and apparently, didn't work.

I know, but you didn't mention where to add it.

Quote:

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Originally Posted by anhn

Add DoEvents before calling UpdateEverything.

Code:

---

Private Sub mnuProcessData_Click()
    'Load a from where some math calculations
    'are performed on a large array of data
    frmDataProcess.Show 1
    DoEvents
    'After the processing, the processed data
    'which were plotted on a picturebox must
    'be replotted as they have changed
    UpdateEverything
End Sub

---

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It worked! :thumb: What happened was I placed the DoEvents statement in the wrong place, i.e. not where you've suggested but inside UpdateEverything.