Re: ListBox in a FormView

David Wilkinson <>
Fri, 28 Apr 2006 11:52:56 -0400
Gerry Murphy wrote:


I've got this strange error I'm hoping someone can shed some
light on.

I'm dealing with an old code base I'm trying to clean up.
To give you an idea of the age it's using VC 1.52c.

Part of the cleanup involved removing uses of
GetDlgItem() as suggested by Joe Newcomer and
using control variables.

That's when I ran into a strange problem.
The symptom is that the form comes up but the listboxes are empty, whereas
before, when GetDlgItem() was used they were filled. I suspected an
uninitialized control, the last two lines in OnInitialUpdate() call
functions to
load the listboxes, but I'm not sure how to correct it.

In stepping through the code I find that the call to AddString() doesn't
an error, but it also doesn't add the string. In the loop where the strings
are added I've checked the count and it's always zero.

Does anybody have any ideas?


Gerry Murphy

BTW: I see code samples using formviews where some people call
the base class CFormView::OnInitialUpdate(); and others where
it's not called. Which is proper? ( The code I'm dealing with
does not call it.)


Before you can use your control variables to do anything Window-ful you
must call UpdateData(FALSE). This is done in CFormView::OnInitialUpdate().

David Wilkinson

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