Vista - Querying for a COM Interface

I have come from a C++ background where I have used the following to work
with COM

CComPtr<IBuilder> builder;
builder.CoCreateInstance(__uuidof(Builder));
CComQIPtr<IPersist> loader(builder);

I can see how to use new-object -comobject to create the builder object, but
how do I go about getting the IPersist interface?

Is there a example/tutorial on using COM in Powershell?
--
Douglas Woods

The Framework's COM interop layer makes a lot of C++-flavored stuff
difficult, and PowerShell's additional adaptation tweaks things a bit
further, even. Can you clarify more about what you need to do with the
IPersist interface?

Typically, with the Framework in general and PowerShell in particular, you
instantiate the COM object using new-object, and then just access its public
methods and properties directly. The actual *COM* interfaces aren't intended
to be accessed. For some objects I've been able to use $obj.psbase to access
the underlying, unadapted object - what I usually get it the Framework's
interop class, though. The Framework doesn't really "like" to surface the
hardcore COM I* interfaces that you'd use in C++.

--
Don Jones
Windows PowerShell MVP
Founder: www.ScriptingAnswers.com
Co-Author: "Windows PowerShell: TFM"

"DouglasWoods" <DouglasWoods@discussions.microsoft.com> wrote in message
news:CAE0DCB9-F299-4CD4-B159-74366E6B81FD@microsoft.com...
>I have come from a C++ background where I have used the following to work
> with COM
>
> CComPtr<IBuilder> builder;
> builder.CoCreateInstance(__uuidof(Builder));
> CComQIPtr<IPersist> loader(builder);
>
> I can see how to use new-object -comobject to create the builder object,
> but
> how do I go about getting the IPersist interface?
>
> Is there a example/tutorial on using COM in Powershell?
> --
> Douglas Woods