RE: Fire an event with an Interface pointer

From:

=?Utf-8?B?Sm9obg==?= <John@discussions.microsoft.com>

Newsgroups:

microsoft.public.vc.atl

Date:

Wed, 7 Mar 2007 15:38:02 -0800

Message-ID:

<C9722D48-DAC9-4728-98A9-B9DEE013221F@microsoft.com>

Scratch the above post, I meant to link to this

http://msdn.microsoft.com/newsgroups/default.aspx?&lang=en&cr=US&guid=&sloc=en-us&dg=microsoft.public.vc.atl&p=1&tid=b4021b1b-a65c-4845-aecb-86213c5f2e01&mid=b4021b1b-a65c-4845-aecb-86213c5f2e01

"John" wrote:

Disregard this post, the problem was in the VB client code.

However if I try to do this from a worker thread

http://msdn.microsoft.com/newsgroups/default.aspx?&lang=en&cr=US&guid=&sloc=en-us&dg=microsoft.public.vc.atl&p=1&tid=e43c27c1-63d5-4bdc-b195-a43b12e383b1&mid=e43c27c1-63d5-4bdc-b195-a43b12e383b1

"John" wrote:

Is it possible to fire an event with an interface pointer as an argument?

Say for instance I have an ATL object called CObj, this object fires an
event, I want a parameter of this event to be an interface pointer to the
object itself.

in the idl file I have created the following;

dispinterface _IObjEvents
{
properties:
methods:
[id(1), helpstring("method event")] HRESULT Event([in] IObj* pobj);
};

Then within the object I fire the event in the following manner;

HRESULT CSomeObj::SomeFunc() {
  Fire_Event(this);
  // ---- or maybe ---- Fire_Event(CComPtr<IObj>(this));
  return S_OK;
}

When I look at the generated _CP.h file it doesn't seem that the generated
code is correct, it generated the following;

HRESULT Fire_Event( IObj * pobj)
{
...
...
    CComVariant avarParams[1];
    avarParams[0] = pobj;
    CComVariant varResult;

...
...
}

When I run this code using a VB client the program crashes on the event
handler, it states that the object in empty. I know this must be possible,
any help would be greatly appreciated