Re: QueryHost returns E_FAIL when trying to embed a Windows Media Player Activex Control in a custom application for windows mobile.

From:

"Alexander Nickolov" <agnickolov@mvps.org>

Newsgroups:

microsoft.public.vc.atl

Date:

Mon, 17 Jul 2006 10:15:52 -0700

Message-ID:

<OedHpScqGHA.4632@TK2MSFTNGP05.phx.gbl>

GetClientRect() is meaningless within WM_CREATE. The window
will get one or more WM_SIZE messages afterwards. Also note
that GetClientRect does not return an HRESULT...

--
=====================================
Alexander Nickolov
Microsoft MVP [VC], MCSD
email: agnickolov@mvps.org
MVP VC FAQ: http://www.mvps.org/vcfaq
=====================================

"bhushan" <mailtovb@gmail.com> wrote in message
news:1153136826.428366.177670@75g2000cwc.googlegroups.com...

Hi ppl,
I am building a simple application that embeds a windows media player
activex control inside my application.my application is running on
windows mobile and i use pocket sdk 2005.

I am not sure if I have to post this in
microsoft.public.windowsce.embedded group or in this group.anyway i am
posting this in both the groups.

In the WndProc function and inside the WM_CREATE message i first do

1.AtlAXWinInit() followed by
2.getting the client rectangle.Next i create a activex window using
CAxWindow::create() method followed by the queryhost function that gets
a reference from the host application.But this queryhost function
returns E_FAIL as a result of which the pointer to the host application
is NULL.I cannot proceed further unless i solve this problem.
the code snippet is as follows:

CAxWindow m_wndView;
WndProc(//the parameters are here)
{
CComPtr<IAxWinHostWindow> spHost;
HRESULT hr;
RECT rcClient;
switch(message)
{
case WM_CREATE:

.AtlAXWinInit();

hr=GetClientRect(hWnd,&rcClient);

m_wndView.Create(hWnd,rcClient,_T("WMP"));

hr = m_wndView.QueryHost(IID_&spHost);
//hr sends an error.the error is E_FAIL.

//here i have to create the windows activex control using the guid of
windows media player.all these doesnt make sense here since i cant even
do queryhost.
}//end switch
}//end wndproc.

Clarifications please.

Thanks in advance.
bhushan.