Re: Why does AfxGetMainWnd returns nulls?

From:
"Scott McPhillips [MVP]" <org-dot-mvps-at-scottmcp>
Newsgroups:
microsoft.public.vc.mfc
Date:
Fri, 29 May 2009 09:32:58 -0400
Message-ID:
<#FgQbIG4JHA.3860@TK2MSFTNGP05.phx.gbl>
"MegK123" <MegK123@discussions.microsoft.com> wrote in message
news:7271AA19-D5F6-4653-AE02-78B5209AC9A1@microsoft.com...

Hello all

I am new to MFC. I have a MFC shared dll, which will be intregarted into
another application. To give details abt the dll, it creates an widget
(having grid format). When I call this MFC dll from the exe, it will
generate
an object for me. Now prior to creating the object, I have a window that
pops
asking few info (like name,type,etc). I want to retrieve the handle to
this
window. I have the create button on this window, within whose code I do
the
following

IINT32 testClass::onCreate(...)
{
typedef long int jint;
CWnd* pWnd = AfxGetMainWnd();
jint hndl = (jint)pWnd->GetSafeHwnd();

}

But, I always receieve an null from AfxGetMainWnd(). and 0 from get
safehwnd(). I do not know exactly how to associate the CWnd to my class
"testClass".


It does not sound like your window that pops up is the "main" window. So
AfxGetMainWnd() is not what you want at all. When you create the popup
window its HWND is the m_hWnd member of the window object.

--
Scott McPhillips [VC++ MVP]

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