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Let's assume that we need to load a number of MDI youngster kinds, allowing every of them to be loaded solely as soon as, and naturally to know when one of many baby varieties is closed. Since we have several kinds to load we wish to use the AddHandler and RemoveHandler keywords so we can be flexible and write the [url=http://www.diecastlinks.co.uk]hollister uk[/url] minimal code we can.

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Personal Sub Form1_Closed(ByVal sender As Object, ByVal e As System.EventArgs) _
Handles MyBase.Closed
RaiseEvent FormClosed(Me)
Finish Sub

3. On our MDI kind we need to declare member variables. The first's of sort Form and the second's type is ArrayList.
Personal m_f(zero) as Form
Private m_sLoadedChildForms As New ArrayList

4. We need to implement a technique the desire search the MDI little one varieties which are loaded. We'll additionally use this method after we unload the MDI child forms.

Personal Function SearchChildForm(ByVal strSearchForm As String, _Optional ByVal idxEventHandler As Long = -1) As Long
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For i = zero To m_sLoadedForms.Count - 1
If m_sLoadedForms.Merchandise(i) = strSearchForm Then
Dim j As Lengthy = zero
For j = m_f.GetLowerBound(zero) To m_f.GetUpperBound(0)
If m_f(j).Identify = strSearchForm Then idxEventHandler = j
Subsequent j
Return i
Finish If
Subsequent
Return -1
End Function

5. We [url=http://www.fibmilano.it]woolrich[/url] have to implement a technique to load the mdi baby varieties and use the SearchChildForm methodology so as to not load the same mdi youngster type second time.

Personal Sub LoadChildForms(ByVal f As Type)
If m_f.GetUpperBound(0) > 0 Then
ReDim Preserve m_f(m_f.GetUpperBound(zero) + 1)
End If
m_f(m_f.GetUpperBound(0)) = f I
f Not SearchChildForm(m_f(m_f.GetUpperBound(0)).Identify()) >= zero Then
m_f(m_f.GetUpperBound(0)).MdiParent = Me
AddHandler m_f(m_f.GetUpperBound(zero)).Closed, _
AddressOf UnloadChildForm
m_f(m_f.GetUpperBound(0)).Show()
m_sLoadedChildForms.Add(m_f(m_f.GetUpperBound(zero)).Identify)
Else
If m_f.GetUpperBound(0) > zero Then
ReDim Preserve m_f(m_f.GetUpperBound(zero) - 1)
Finish If
Finish If
End Sub

6. Finally we need to implement a method to take out our mdi youngster kind from the [url=http://www.teatrodeoro.com/hollisterde.php]hollister[/url] array list so we will [url=http://www.davidhabchy.com]barbour sale[/url] load it once more if we want.

Personal Sub UnloadForm(ByVal sender As System.Object, ByVal [url=http://park19.wakwak.com/~takeda-kazu/cgi-bin/bbs/aska.cgi?res=24185]hollister uk The Middle The M[/url] e As System.EventArgs)
Dim i As Long
Dim s As String = sender.GetType().Identify
Dim IndexForEventHandler = -1
i = SearchChildForm(s, IndexForEventHandler)
If i >= zero Then m_sLoadedForms.RemoveAt(i)
If IndexForEventHandler >= 0 Then
RemoveHandler m_f(IndexForEventHandler).Closed, AddressOf UnloadForm
m_f(IndexForEventHandler) = Nothing
Finish If
End Sub

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