Hiding MDI forms

[Kevin]

I've got a timer on my MDI parent form. If there's no mouse movement
for a set number of minutes, the Visible property of all open forms is
set to False and the Log On form is displayed. I could do it in VB6.

In VB2005 I can get a list of all the open forms, but I get an error
after hiding the first one.

This is what I'm trying to use:

For Each m In My.Application. OpenForms
If m.Name <> "frmMain" Then
m.Visible = False
End If
Next m

It won't list all the open forms if one of the child forms is showing
another modal form. And again, once it hides the first form, it bombs
out--something about my OpenForms collection changing.

[Kevin]

How can I reference them by name? If I put the names of all open forms
into a string array, how can I go back through the list and change
their Visible property back to True?
On Sun, 25 Jun 2006 11:18:54 -0400, "Smokey Grindle"
<no****@dontspa mme.com> wrote:

you can access them by index...

for i as integer = 0 to my.application. openforms.count -1
my.application. openforms(i).vi sible = false
next

"Kevin" <ke****@cfl.rr. com> wrote in message
news:lf******* *************** **********@4ax. com...

I started to do the For Next loop, but I'm not real sure how to call
each form.
On Sat, 24 Jun 2006 15:17:50 -0400, "Smokey Grindle"
<no****@dontspa mme.com> wrote:

I bet you anything your exception is because you are modifying the
collection and the enumeration is changing

for each depends on the enumeration it stay constant... you cant change it
during the loop... so when you hide a form its probably removing it from
the
enumeratio n of open forms and its like oh look i change cant keep going...
this also applies to looping through other collection enumerations like
list
box items and such and like removing an item from the list while you are
going through it... the only way around it is drop the for each and use a
for i as integer = 0 to my.application. openforms.count -1 type of loop
this will not be affected by the collection changing like for each is

[R. MacDonald]

Hello, Kevin,

I suggest that you try something like the following. Sorry I haven't
tested this because I'm not currently using 2005. :-( Worse, I don't
seem to be able to open MSDN just now to check whether or not OpenForms
has an array nature or a collection nature. If the latter, try changing
my use of "Length" to "Count".

Dim IndexOfNonMainF orm As Integer = 0
While Me.MdiChildren. Length > 1
Dim m As Form = MdiChildren(Ind exOfNonMainForm )
If (m.Name = "frmMain") Then
IndexOfNonMainF orm = 1
m = MdiChildren(Ind exOfNonMainForm )
End If
m.Visible = False
End While

Cheers,
Randy
Kevin wrote:

I've got a timer on my MDI parent form. If there's no mouse movement
for a set number of minutes, the Visible property of all open forms is
set to False and the Log On form is displayed. I could do it in VB6.

In VB2005 I can get a list of all the open forms, but I get an error
after hiding the first one.

This is what I'm trying to use:

For Each m In My.Application. OpenForms
If m.Name <> "frmMain" Then
m.Visible = False
End If
Next m

It won't list all the open forms if one of the child forms is showing
another modal form. And again, once it hides the first form, it bombs
out--something about my OpenForms collection changing.