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try this code...<br />
assuming MDIParentForm1 to be an instance of the parent form in your mdi application,<br />
<br />
<br />
dim i as integer = 0<br />
<br />
for i=0 to MDIParentForm1.MdiChildren<wbr />.GetLength<wbr />(0)<br />
&nbsp; &nbsp; MDIParentForm1.MdiChildren<wbr />(i).Close(<wbr />)<br />
next<br />
<br />
dim child1 as new childform1()<br />
child1.MDIParent = MDIParentForm1<br />
child1.Show()
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try this code...
assuming MDIParentForm1 to be an instance of the parent form in your mdi application,


dim i as integer = 0

for i=0 to MDIParentForm1.MdiChildren.GetLength(0)
    MDIParentForm1.MdiChildren(i).Close()
next

dim child1 as new childform1()
child1.MDIParent = MDIParentForm1
child1.Show()

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how well does the Close function release the form object? i have critical memory management issues in my application..
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how well does the Close function release the form object? i have critical memory management issues in my application..

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Hello!<br />
Unfortunatelly, there is no Forms collection in VB.NET... So, you have to create your own collection. You'll find an example at:<br />
<a href="http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/vaconCreatingYourOwnCollectionClass.asp" rel="ugc">http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/vaconCreatingYourOwnCollectionClass.asp</a>
</div>


Hello!
Unfortunatelly, there is no Forms collection in VB.NET... So, you have to create your own collection. You'll find an example at:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/vaconCreatingYourOwnCollectionClass.asp [http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/vaconCreatingYourOwnCollectionClass.asp]

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i was afraid of that. &nbsp;I will use hide instead. &nbsp;ty
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i was afraid of that.  I will use hide instead.  ty

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<div class="content wysiwyg-content">
i have an MDI application with multiple child forms..how do i close any open child forms so that only one child form is open at a time...
</div>
</div>


i have an MDI application with multiple child forms..how do i close any open child forms so that only one child form is open at a time...

Simple Code for .net - Best way to close child form

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