> I have a parent form which contains a toolbar.  The toolbar controls the
> loading and switching to of MDI child forms.
>
> The code for the toolbar click event and one of the subroutines that loads
> and shows a child form is:
>
> Private Sub tbMenu_ButtonClick(ByVal sender As System.Object, ByVal e As
> System.Windows.Forms.ToolBarButtonClickEventArgs) Handles tbMenu.ButtonClick
> Dim btn As System.Windows.Forms.ToolBarButton
> For Each btn In Me.tbMenu.Buttons
> If Me.Tag = e.Button.Tag Then
> btn.Pushed = True
> Else
> btn.Pushed = False
> End If
> Next
> Select Case e.Button.Tag
> Case "0"
> AccountEnquiry()
> Case "1"
> PostInvoice()
> Case "99"
> Me.Close()
> End Select
> End Sub
> Private Sub AccountEnquiry()
> ' Account Enuiry
> Static frm As New frmPurchaseLedgerAccount
> Try
> If IsNothing(frm) Then frm = New frmPurchaseLedgerAccount
> With frm
> .SuspendLayout()
> .MdiParent = Me
> .WindowState = Windows.Forms.FormWindowState.Maximized
> .BringToFront()
> .Show()
> .ResumeLayout()
> End With
> Catch
> frm = Nothing
> AccountEnquiry()
> End Try
> End Sub
>
>
> This works fine when the toolbar button is first clicked.  The form just
> loads and displays.
>
> However, if you then click to another child form and then click back, you
> can see the form display and then expand to maximised within the parent form
> which flickers and is annoying.  I tried inserting the suspendlayout and
> resume layouts to see if that helps but it doesn't.  Can anybody suggest a
> way to stop the flickering?
>
> Thanks in advance
> Simon
> --
> ================================
> Simon Verona
> Dealer Management Service Ltd
> Stewart House
> Centurion Business Park
> Julian Way
> Sheffield
> S9 1GD
>
> Tel: 0870 080 2300
> Fax: 0870 735 0011

news:1142984413.511535.174120@v46g2000cwv.googlegroups.com...
> Hi Simon, I am clear what you mean. Why do you not post the lines (and
> only the lines) that show your problem, so that we can replicate the
> problem and suggest a solution?
>
> It may just be a matter of use activate() instead of bring to front...
> (?)
>
> -tom
>
>
> Simon Verona ha scritto:
>
>> I have a parent form which contains a toolbar.  The toolbar controls the
>> loading and switching to of MDI child forms.
>>
>> The code for the toolbar click event and one of the subroutines that
>> loads
>> and shows a child form is:
>>
>> Private Sub tbMenu_ButtonClick(ByVal sender As System.Object, ByVal e As
>> System.Windows.Forms.ToolBarButtonClickEventArgs) Handles
>> tbMenu.ButtonClick
>> Dim btn As System.Windows.Forms.ToolBarButton
>> For Each btn In Me.tbMenu.Buttons
>> If Me.Tag = e.Button.Tag Then
>> btn.Pushed = True
>> Else
>> btn.Pushed = False
>> End If
>> Next
>> Select Case e.Button.Tag
>> Case "0"
>> AccountEnquiry()
>> Case "1"
>> PostInvoice()
>> Case "99"
>> Me.Close()
>> End Select
>> End Sub
>> Private Sub AccountEnquiry()
>> ' Account Enuiry
>> Static frm As New frmPurchaseLedgerAccount
>> Try
>> If IsNothing(frm) Then frm = New frmPurchaseLedgerAccount
>> With frm
>> .SuspendLayout()
>> .MdiParent = Me
>> .WindowState = Windows.Forms.FormWindowState.Maximized
>> .BringToFront()
>> .Show()
>> .ResumeLayout()
>> End With
>> Catch
>> frm = Nothing
>> AccountEnquiry()
>> End Try
>> End Sub
>>
>>
>> This works fine when the toolbar button is first clicked.  The form just
>> loads and displays.
>>
>> However, if you then click to another child form and then click back, you
>> can see the form display and then expand to maximised within the parent
>> form
>> which flickers and is annoying.  I tried inserting the suspendlayout and
>> resume layouts to see if that helps but it doesn't.  Can anybody suggest
>> a
>> way to stop the flickering?
>>
>> Thanks in advance
>> Simon
>> --
>> ================================
>> Simon Verona
>> Dealer Management Service Ltd
>> Stewart House
>> Centurion Business Park
>> Julian Way
>> Sheffield
>> S9 1GD
>>
>> Tel: 0870 080 2300
>> Fax: 0870 735 0011
>

"Simon Verona" <nom***@nomail.zzz> wrote in message
news:OBmilnYTGHA.4600@TK2MSFTNGP11.phx.gbl...
>
>
> <tommaso.gasta***@uniroma1.it> wrote in message
> news:1142984413.511535.174120@v46g2000cwv.googlegroups.com...
>> Hi Simon, I am clear what you mean. Why do you not post the lines (and
>> only the lines) that show your problem, so that we can replicate the
>> problem and suggest a solution?
>>
>> It may just be a matter of use activate() instead of bring to front...
>> (?)
>>
>> -tom
>>
>>
>> Simon Verona ha scritto:
>>
>>> I have a parent form which contains a toolbar.  The toolbar controls the
>>> loading and switching to of MDI child forms.
>>>
>>> The code for the toolbar click event and one of the subroutines that
>>> loads
>>> and shows a child form is:
>>>
>>> Private Sub tbMenu_ButtonClick(ByVal sender As System.Object, ByVal e As
>>> System.Windows.Forms.ToolBarButtonClickEventArgs) Handles
>>> tbMenu.ButtonClick
>>> Dim btn As System.Windows.Forms.ToolBarButton
>>> For Each btn In Me.tbMenu.Buttons
>>> If Me.Tag = e.Button.Tag Then
>>> btn.Pushed = True
>>> Else
>>> btn.Pushed = False
>>> End If
>>> Next
>>> Select Case e.Button.Tag
>>> Case "0"
>>> AccountEnquiry()
>>> Case "1"
>>> PostInvoice()
>>> Case "99"
>>> Me.Close()
>>> End Select
>>> End Sub
>>> Private Sub AccountEnquiry()
>>> ' Account Enuiry
>>> Static frm As New frmPurchaseLedgerAccount
>>> Try
>>> If IsNothing(frm) Then frm = New frmPurchaseLedgerAccount
>>> With frm
>>> .SuspendLayout()
>>> .MdiParent = Me
>>> .WindowState = Windows.Forms.FormWindowState.Maximized
>>> .BringToFront()
>>> .Show()
>>> .ResumeLayout()
>>> End With
>>> Catch
>>> frm = Nothing
>>> AccountEnquiry()
>>> End Try
>>> End Sub
>>>
>>>
>>> This works fine when the toolbar button is first clicked.  The form just
>>> loads and displays.
>>>
>>> However, if you then click to another child form and then click back,
>>> you
>>> can see the form display and then expand to maximised within the parent
>>> form
>>> which flickers and is annoying.  I tried inserting the suspendlayout and
>>> resume layouts to see if that helps but it doesn't.  Can anybody suggest
>>> a
>>> way to stop the flickering?
>>>
>>> Thanks in advance
>>> Simon
>>> --
>>> ================================
>>> Simon Verona
>>> Dealer Management Service Ltd
>>> Stewart House
>>> Centurion Business Park
>>> Julian Way
>>> Sheffield
>>> S9 1GD
>>>
>>> Tel: 0870 080 2300
>>> Fax: 0870 735 0011
>>
>
> Ok.
>
> It's hard to tell exactly which line causes the problem.
>
> What I'm trying to do is manage MDI forms in code using a toolstrip with
> buttons on.
>
> Each time a button on the toolstrip is clicked, the mdi child form for
> that button will be created is it doesn't exist and then maximised to fill
> the parent mdi form space.
>
> The code I use to instantiate the child form and then display it is :
>
> Private Sub AccountEnquiry()
> ' Account Enuiry
> Static frm As New frmPurchaseLedgerAccount
> Try
>    If IsNothing(frm) Then frm = New frmPurchaseLedgerAccount
>   With frm
>       .SuspendLayout()
>       .MdiParent = Me    ' Makes sure the child form is a mdi child
>       .WindowState = Windows.Forms.FormWindowState.Maximized ' this
> maximises it to fill the window
>       .BringToFront()  ' This makes sure it is the front mdi child
>       .Show()  ' Shows the form
>       .ResumeLayout()
>    End With
> Catch
>    ' It hits here if the child form has been previously displayed and then
> closed - it's then disposed so just needs setting to nothing and then
> redisplaying
>    frm = Nothing
>    AccountEnquiry()
> End Try
> End Sub
>
> On first instantiation the form just "shows" - already maximised in the
> parent.
>
> However, if the form already is instantiated and the user is simply
> switching back to it, then the form will display in "normal" size (ie not
> maximised) and will then "expand" to fill the window.  This gives a
> noticeable and annoying flickering.
>
> Does that clarify?
>
> Regards
> Simon
>
>
Typical