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From: ccwork on 25 Mar 2005 11:23
"Scott McPhillips [MVP]" wrote:

> ccwork wrote:
> > What's the meaning of "CWnd is already created"? I try to create the
> > activeX control in the constructor of class derived from CWnd. And how do I
> > know the m_hWnd has a value?
>
> A CWnd is merely a wrapper around a Win32 window. You can't do much
> with a CWnd until it is connected to an actual Win32 window. The CWnd
> is not a window until its Create function has been called. So its
> m_hWnd value is NULL until after the Create function has been called.
>
> You cannot create a child window until after its parent window has been
> created. You can create a child window in the parent's OnCreate message
> handler, but you cannot create a child window in the constructor.
>

But as in InitInstance() I created the Wnd and the m_hWnd is there (message
appears) but the control ""Could not place control" still appears.

wnd->Create(NULL, "Hello");
if (wnd->m_hWnd)
AfxMessageBox("m_hWnd is there");
wnd->test();

wnd is an object of CFrameWnd.
From: ccwork on 25 Mar 2005 23:23
No, the control is "mscal.calendar.7" which comes with Windows but not Visual
C++

"Victor" wrote:

> Take a look at MSDN article "PRB: Dynamic Creation of Redistributable
> Control Fails"
> (Article ID: Q151804)
> Is it your case?
>
> Regards,
>
> Victor
>
> "ccwork" <ccwork(a)discussions.microsoft.com> wrote in message
> news:7F11C3BC-5063-4246-8C82-DFB5788C07B7(a)microsoft.com...
> > Hi,
> > I try to insert ActiveX to my program as following:
> >
> > class MyWnd:public CFrameWnd
> > {
> > public:
> > MyWnd()
> > {
> > CString strControlProgid;
> > strControlProgid="mscal.calendar.7";
> > m_Control.DestroyWindow();
> > RECT rc;
> > ::GetClientRect(m_hWnd,&rc);
> > BOOL bStat=FALSE;
> > bStat=m_Control.CreateControl(strControlProgid, "",
> WS_VISIBLE,
> > rc,
> > this, 5000, NULL, FALSE, NULL);
> > if (bStat == FALSE)
> > {
> > ::MessageBox (m_hWnd,"Error!!","Could not place
> > control",MB_OK);
> > }
> > }
> > private:
> > CWnd m_Control;
> > }
> > class MyApp:public CWinApp
> > {
> > MyWnd *wnd;
> > public:
> > BOOL InitInstance()
> > {
> > AfxEnableControlContainer();
> > wnd=new MyWnd();
> > }
> > }
> >
> > The error prompt "Error!! Could not place control" always appear. Anyone
> > know what the problem?
>
>
>
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