Can Msgbox act as DoEvents?

I've noticed, sometimes while running my program, that if i place messageboxes at certain points, my results are different, than if I left them out.

Would these act as doevents and allow my program to calculate things when normally it wouldnt?

No they dont do the same things. Msgboxs halt all processes until it is dismissed whereas DoEvents returns control to the OS so it can process stuff while your application is running.

hrm, why would my program output different numbers when I display a message box then? :/

Quote:

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Originally Posted by kfcSmitty

hrm, why would my program output different numbers when I display a message box then? :/

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I have no idea. What is the code that is being run with, and without, the message box?

its the exact same code, just I have

msgbox "Campustotal: " & campustotal

placed in there :/

Are you running it compiled or just in the IDE? Are you using any Timer control(s)? Post some of the related code.

VB Code:

Public Sub GetIncreases(Account As String, Hours As Integer, Payband As String, IDed As String)
If WorkerForm Or FirstTime Then
    total = 0
    FirstTime = False
End If
Set rsIncreaseAmounts = New ADODB.Recordset
rsIncreaseAmounts.Open "Increases", cn, adOpenKeyset, adLockPessimistic, adCmdTable
rsIncreaseAmounts.MoveFirst
Set RsIncreases = New ADODB.Recordset
RsIncreases.Open "Increases", cn, adOpenKeyset, adLockPessimistic, adCmdTable
RsIncreases.MoveFirst
Increases = RsIncreases.Fields("NumofIncreases")
NextDate = "4/1"
    For i = 0 To Increases
        Days(i) = 0
        'If Not SelectForm Then
            If i > 1 Then rsIncreaseAmounts.MoveNext
            If i = 0 Then
                FirstTime = True
                IncreaseAmount(i) = 1
            ElseIf i = 1 Then
                IncreaseSave = IncreaseSave + RsIncreases.Fields("Amount")
                IncreaseAmount(i) = (IncreaseSave / 100) + 1
            ElseIf i > 1 And i <= Increases Then
                IncreaseSave = IncreaseSave + RsIncreases.Fields("Amount")
                IncreaseAmount(i) = (IncreaseSave / 100) + 1
            End If
            If i <> 0 Then RsIncreases.MoveNext
            'Sets the date to next date
            'If no nextdate exists, input 31/3 (March 31)
            If i < Increases Then
                StartDate = CDate(NextDate)
                NextDate = CDate(RsIncreases.Fields("IncreaseDate"))
            Else
                StartDate = CDate(NextDate)
                NextDate = CDate("3/31")
            End If
       ' Else
            'Splitter
       ' End If
        Anniversary
        'If SomeVar Then
        dtmTestDate = CDate(StartDate)
        If CDate(NextDate) - CDate(StartDate) <= 0 Then
            NextDate = CDate(NextDate) + 365
        End If
        Do Until CDate(dtmTestDate) >= CDate(NextDate)
            If Weekday(dtmTestDate) = vbSaturday _
            Or Weekday(dtmTestDate) = vbSunday Then
                ' skip it
            Else
                Days(i) = Days(i) + 1
            End If
            dtmTestDate = DateAdd("d", 1, CDate(dtmTestDate))
        Loop
        If i = 0 Then
             Days(i) = Days(i) + 1
        'End If
        End If
        Select Case Account
            Case "42000", "42500" 'Support
                Call Supports(Hours, Payband, Account)
                    Forms![frmworkerinformation].txtID.SetFocus
                   If AnniversaryHappened And anniversaryCurrent Then
                       total = Days(i) * (newSupportDailyTotal * IncreaseAmount(i))
                       DoEvents
                       Campustotal = Campustotal + total
                   ElseIf AnniversaryHappened Then
                       total = DaysBefore * (SupportDailyTotal * IncreaseAmount(i))
                       total = total + DaysAfter * (newSupportDailyTotal * IncreaseAmount(i))
                       anniversaryCurrent = True
                       DoEvents
                       Campustotal = Campustotal + total
                   Else
                       total = (Days(i) * (SupportDailyTotal * IncreaseAmount(i)))
                       Campustotal = Campustotal + total
                   End If
            Case "40100", "40300", "40400", "40800" 'FullTime Academics
                If AnniversaryHappened And anniversaryCurrent Then
                    Call FullTimeAcademics(Payband, Account)
                    total = (Days(i) * (newPaybandAmount * IncreaseAmount(i)))
                    Campustotal = Campustotal + total
                ElseIf AnniversaryHappened Then
                    total = DaysBefore * (PaybandAmount * IncreaseAmount(i))
                    total = total + DaysAfter * (newPaybandAmount * IncreaseAmount(i))
                    Campustotal = Campustotal + total
                Else
                    total = (Days(i) * (PaybandAmount * IncreaseAmount(i)))
                    Campustotal = Campustotal + total
                End If
            Case "41200", "40404" 'Parttime Sessional
                Call AcademicPTSS(Hours, Payband, Account)
                If AnniversaryHappened And anniversaryCurrent Then
                    total = Days(i) * (newAcaPTSSDailyTotal * IncreaseAmount(i))
                    Campustotal = Campustotal + total
                ElseIf AnniversaryHappened Then
                    total = total + DaysBefore * (AcaPTSSDailyTotal * IncreaseAmount(i))
                    total = total + DaysAfter * (newAcaPTSSDailyTotal * IncreaseAmount(i))
                    Campustotal = Campustotal + total
                Else
                    total = (Days(i) * (AcaPTSSDailyTotal * IncreaseAmount(i)))
                    Campustotal = Campustotal + total
                End If
            Case "41201" 'Partial Load
                Call AcademicPL(Hours, Payband, Account)
                If AnniversaryHappened And anniversaryCurrent Then
                    total = Days(i) * (newAcaPLDailyTotal * IncreaseAmount(i))
                    Campustotal = Campustotal + total
                ElseIf AnniversaryHappened Then
                    total = DaysBefore * (AcaPLDailyTotal * IncreaseAmount(i))
                    total = total + DaysAfter * (newAcaPLDailyTotal * IncreaseAmount(i))
                    Campustotal = Campustotal + total
                Else
                    total = (Days(i) * (AcaPLDailyTotal * IncreaseAmount(i)))
                    Campustotal = Campustotal + total
                End If
            Case "41500", "41900"
                Call Administration
        End Select
    Next
    rsIncreaseAmounts.Close
    RsIncreases.Close
    MsgBox "SupportBi-weeklyTotal: " & SupportDailyTotal * 10
    MsgBox "Support New bi-weekly total: " & newSupportDailyTotal * 10
End Sub

thats a chunk of code..lots of other stuff..but this is where im pretty sure its happening...now withose msgboxes on the bottom, it gives me a value of 133,000 approx..but without them it gives me approxd 48,000

i threw in some doevents to see if that would clear ir up..but i have no idea as to whats happening

I think there are instances when we use a msgbox the cpu still processes some tasks/events like a timer or refreshing a webbrowser... I might be wrong though...

Correct Dee-U. If there is a timer of if this procedure is called from a timer event procedure then the compiled version will
continue to process lines of code and the msgbox will not have its Modal effect. This is why I asked about having a timer in
your app/project.

If you have loops rather than timers running, that'll do it too.

We subclass and capture the windows APPACTIVATE message - so we know when app loses and gains focus over other app's on the machine...

That event fires even when a modal message box is on the screen.

We needed to set a global variable before each and every modal event, so that the subclass function would know not to run...

If you remove the DOEVENTS does it still happen?

Place some debug.print's at the top of this function and others that call it (prior to it in the chain) - something is firing this function multiple times would be my guess...

MsgBox's don't halt processing. Your app is proceeding line by line in the same sub/function, but vb does have minor capabilities of multithreading. Therefore, if other subs/functions are running, they will not stop because a msgbox pops up.

On a seperate case: Let's say you're loading a page in the webbrowser and you pop up a message box. The browser will continue loading the page but most of the program's functionality is halted. Doevents simply allows to capture input from devices such as the mouse and keyboard, as well as visual processing of the application.

I read somewhere that there is an issue with the Timer control. IT works differently in a compiled EXE and in the IDE. In one of them msgbox halts the timer while in the other it allows it to continue.

So avoid timers in such situations where it would show a message box.

Pradeep :)