Re: Application Hangs when going through CPropertySheet OnInitDialog f

ZaZy <>
Thu, 05 Mar 2009 19:56:23 +0100
gag ha scritto:

On Feb 27, 1:40 pm, ZaZy <> wrote:

gag ha scritto:

On Feb 27, 7:06 am, ZaZy <> wrote:

gag ha scritto:

On Feb 9, 9:07 pm, RainMan <Rain...@online.nospam> wrote:

OS does not really matter. Modify property sheet extended style adding
If not set property sheet has a problem restoring control?s focus after
focus was switched from a property page to another window or control.
Property page ends up in an endless loop once it hits property sheet. It
cannot find any control since default property sheet style does not have
WS_EX_CONTROLPARENT will cause property sheet to be treated as another
control when embedded in another window and allow for tabbing through
property sheet controls and property pages without any problem.
"gag" wrote:

Hi all,
We have an application that hangs for some users who are running XP sp
3 and Vista. The application is a MFC dialog with a CPropertySheet
which contains two CPropertyPages on the dialog. It looks like the
application goes into the CPropertySheet OnInitDialog and never
returns. When I look in the task manager it shows that it is still
This hang only happens for some users. For those users I have had them
start up in safe mode and the app will successfully launch. It seems
like there maybe some conflict with another app that is running.
The real hassle is that I cannot recreate it at work or at home to try
to work on it.
Does anyone have any suggestions? I am running out of things to try.
Any help would be greatly appreciated.
Thank you in advance!
Greg- Hide quoted text -

- Show quoted text -

We are setting this styel already. I read that setting the
WS_EX_CONTROLPARENT before the CPropertySheet::onInitDialog call could
cause this problem. I also read that setting it after the onInitDialog
could also cause the endless loop. I have tried both and do not know
where to go from here.

Dave, just try this:
BOOL CMyPropertySheet::PreTranslateMessage(MSG* pMsg)
        if( pMsg->message == WM_GETDLGCODE)
                return FALSE;
        return CPropertySheet::PreTranslateMessage(pMsg);
And remember that the MyPropertySheet instance should not be child of a
This simply tells to do not dispatch that damned message and SHOULD (in
my casa HAS) solve the problem.
Try and please let us know!
ZaZy- Hide quoted text -
- Show quoted text -

Still having the problem. The property sheet is not a child of any
control. It is put onto CDialog object. I use the following code.
      m_appPropSheet.EnableStackedTabs( FALSE );
      m_appPropSheet.Create(this, WS_CHILD | WS_VISIBLE , 0);
     m_appPropSheet.ModifyStyleEx (0, WS_EX_CONTROLPARENT);
      m_appPropSheet.ModifyStyle( 0, WS_TABSTOP);
      m_appPropSheet.SetWindowPos(NULL, 0, 0, 0, 0,
Is this code causing the problem?
I am really stuck on this and our clients are getting impatient

Hi greg,

Your code appears get no problems other than the fact that the
ModifyStyleEx is not in the oninit of the derived class.
I suppose that m_appPropSheet is of type CMyPropertySheet in suggesting
you these add (i include also the pretranslatemessage that had been
already posted)

void CMyPropertySheet::OnKillFocus(CWnd* pNewWnd)
        // This takes focus away from the propertysheet (this is one of the
causes of loop)



BOOL CMyPropertySheet::OnInitDialog()
        ModifyStyleEx(0, WS_EX_CONTROLPARENT);
        return TRUE;


BOOL CMyPropertySheet::PreTranslateMessage(MSG* pMsg)
        if( pMsg->message == WM_GETDLGCODE)
                return FALSE;
        return CPropertySheet::PreTranslateMessage(pMsg);


Another try you can do is to move the ModifyStyleEx contained in the
OnInitDialog BEFORE the CPropertySheet::OnInitDialog.
This solved all my PropertySheets problems.
Hoping this helps.
Let us know- Hide quoted text -

- Show quoted text -

In the code we have tried moving the ModifyStyleEx (0,
WS_EX_CONTROLPARENT); call before the CPropertySheet::onInitDialog
call and when we create the property sheet,

None of these changes have worked.



If you can provide an "extract" of the code that generates the dialog so
that it could be better analized i can give it a look also with spy++
(Win XP SP3 & much virtual machines). Also a list of running processes
on the machine that are having trouble is a good help.

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