Re: unable to use interface IWMPSettings2

From:

"jiangsheng[MVP]" <sheng_jiang@hotmail.com.discuss>

Newsgroups:

microsoft.public.vc.mfc

Date:

Sat, 17 Jun 2006 16:52:00 -0500

Message-ID:

<uIjQa4YkGHA.1272@TK2MSFTNGP03.phx.gbl>

call QueryInterface on the IDispatch returned by settings

--
Regards
Sheng Jiang

Microsoft Most Valuable Professional in Visual C++
http://www.jiangsheng.net
http://blog.joycode.com/jiangsheng/
"Ashutosh" <ashu-wipro@nospam.nospam> ?;#XN
news:%23WBxljWkGHA.1208@TK2MSFTNGP02.phx.gbl...

Hi
I added two wrapper classes CWMPPlayer4 and CWMPSettings2 to wrap

interfaces

IWMPPlayer4 and IWMPSettings2 respectively.

I have a windows media player control on my dialog box. I have added a
control variable "wmp" of type CWMPPlayer4.
The problem is that I can't get pointer of CWMPSettings2 .
the fuction CWMPSettings2 ::get_settings is (this code is automatically
generated when I add the class from activeX dll)
LPDISPATCH get_settings()

{

LPDISPATCH result;

InvokeHelper(0x5, DISPATCH_PROPERTYGET, VT_DISPATCH, (void*)&result,

NULL);

return result;

}

when I do CWMPSettings2 sp= wmp.get_settings();
it gives me error so I tried
LPDISPATCH LP=wmp.get_settings();

CWMPSettings2 *sp=(CWMPSettings2*)&LP;

long k=sp->get_volume();

Even this doesn't work, the application just crashes, when calling any
function..

Please help.

Regards,

Ashutosh