Sure you can pass out an interface* from an object you've created
internally. But the recipient needs to marshal the pointer before
using it in a different apartment. This is the same whether the
object is activated w/ CCI or CreateInstance.

// tim

> -----Original Message-----
> From: Distributed COM-Based Code [mailto:DCOMDISCUSS.MICROSOFT.COM]On
> Behalf Of Vimal Kumar
> Sent: Tuesday, June 05, 2001 4:50 PM
> To: DCOMDISCUSS.MICROSOFT.COM
> Subject: CoCreateInstance(Ex)...do we really need to use it ?
>
>
> Thanks to all you guys for your prompt reply. Atleast now I can
> say that if
> all objects are in the same DLL and they are used from C++ client, I can
> create the objects internally using new or CComObjectXX::CreateInstance().
> Can I hand this pointer out to any other clients ( assuming I AddRef() ??
> The reason I ask is, suppose I spawn a thread from my interface
> method, call
> CoIntialize(Ex) on that thread, and then execute some interface methods on
> that thread - is it fine ? How will COM understand about marshaling the
> interfaces ? I didn;t create the object using CoCreateInstance(Ex).
>
> Is there a proper document that explains the working right from the
> CoInitialize(), CoCreateInstance()...to CoUnInitialize() ?
>
> Thanks again for all your help.
>
> -Vimal
> ----- Original Message -----
> From: "Leon Finker" <lf21NETZERO.NET>
> To: <DCOMDISCUSS.MICROSOFT.COM>
> Sent: Tuesday, June 05, 2001 7:38 AM
> Subject: Re: CoCreateInstance(Ex)...do we really need to use it ?
>
>
> > Hi,
> >
> > The hidden window is created per STA apartment and not
> > per object in that apartment. So, it should be created when
> > apartment is entered and initialized, which is at CoInitialize(Ex)
> >
> > ----- Original Message -----
> > From: "Vimal Kumar" <vimalnCSWL.COM>
> > To: <DCOMDISCUSS.MICROSOFT.COM>
> > Sent: Monday, June 04, 2001 11:15 PM
> > Subject: CoCreateInstance(Ex)...do we really need to use it ?
> >
> >
> > Back to some basic question. I am sure this question has been asked in
> > several different ways but even after going through the list archives I
> > could not find a valid answer to my question.
> >
> > The following scenarion describes the problem.
> >
> > I have 2 inproc object viz 'A' & 'B'
> > From my client code I call CoInitialize(NULL)
> > I call CoCreateInstance(..."A" )
> > A->CreateBObject(); // CreateBObject creates an instance of
> object B and
> > keeps a reference to IB
> > Should I use CoCreateInstance to create object B ? What wrong can happen
> if
> > I use "new" instead of CoCreateInstance ?
> > Both A & B are implemented by the same server.
> > Does CoCreateInstance() do anything other than (a) Get the CLSID from
> > registry (b) find the corresponding DLL from InProcServer32 key (c) Load
> the
> > dll & call DllGetClassObject() (d) Call CreateInstance on the class
> factory
> > object.
> >
> > Who creates OleMainThreadWndName hidden window ? Is it CoInitialize() ??
> >
> > Ahh....I am confused !!!! Help me..
> >
> > -Vimal
> >
> >
> >
> > ----------------------------------------------------------------
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> >
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>
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