> I am attempting to access a function out of another running application.
I
> started out using the CreateOLEObject function, but realized that was
> creating another instance of the server.  I've figured out that I need to
> use the GetActiveOLEObject function to access it without having a second
> instance.  However, when I use the GetActiveOLEObject function, I get the
> error 'Operation Unavailable'.  What I've found from the web is that I
need
> to use the RegisterActiveObject API call to register the OLE component
with
> the Running OLE Table.  How do I use that call?  I have found examples of
> usage, but I'm not sure what the parameters stand for.  Anyone out there
> willing to give a guy a hand?  -=)

> Thanks,

> -Aaron

> here's a short example of ROT (Running Object Table) usage... you can read
> further about it in the Delphi Help...

> First, you'll need to register the object in the ROT... in this example it
> is the server that registers itself into the ROT (ie. the first time it
> get's created).

> var
>   FRotCookie : integer;
> ...
>   // Register the object in the ROT
>   RegisterActiveObject(Self, Class_BSMsgSvr, ACTIVEOBJECT_WEAK,
FROTCookie);

> the call use a reference to the object (Self), the Class ID of the CoClass
> GUID, a registration type constant, and a cookie. You'll need to change
the
> Class ID for your own class, and perhaps the registration type depending
on
> your needs... the registration type can be either the one in the example,
or
> ACTIVEOBJECT_STRONG... a weak registration basically means that the ROT
> doesn't AddRef the object when it is registered, and a strong registration
> that it does. The weak registration will mean that the registered object
> will be destroyed when the last client drops it's reference(s) to the
> object.

> To unregister the object, you'll only need the cookie (FROTCookie from the
> example above).

>   // Revoke (unregister) object from ROT
>   RevokeActiveObject(FROTCookie, nil);

> the second parameter is reserved... just pass 'nil'.

> For a user (or client) to retrieve the object from the ROT, you'll use
> GetActiveObject along with the Class ID of the object you desire... in the
> example above, the Class ID was Class_BSMsgSvr so that's what we'll have
to
> use.

> var
>     Unk : IUnknown;
> begin
>     GetActiveObject(Class_BSMsgSvr, nil, Unk);

> The second parameter is (again) reservered... the last parameter, Unk, is
a
> pointer to the object. All you need to do from here is a
Unk.QueryInterface
> for the interface you need.

> And don't forget to check the HResult of the calls, or perform a OleCheck
on
> the call ;-)

> Cheers,
> Thomas

> "A G" <aa...@ugomedia.com> wrote in message news:3b8e6f54_2@dnews...
> > Hello all -

> > I am attempting to access a function out of another running application.
> I
> > started out using the CreateOLEObject function, but realized that was
> > creating another instance of the server.  I've figured out that I need
to
> > use the GetActiveOLEObject function to access it without having a second
> > instance.  However, when I use the GetActiveOLEObject function, I get
the
> > error 'Operation Unavailable'.  What I've found from the web is that I
> need
> > to use the RegisterActiveObject API call to register the OLE component
> with
> > the Running OLE Table.  How do I use that call?  I have found examples
of
> > usage, but I'm not sure what the parameters stand for.  Anyone out there
> > willing to give a guy a hand?  -=)

> > Thanks,

> > -Aaron

> I tried what you said, and I still recieve the 'Operation Unavailable'
> error.  Here's the scoop...

> I have a Service Application with an Automation Object attached to it.
The
> Automation Object has a class CoUMIEIS with an application name of umieiss
> (making the ProgID umieiss.CoUMIEIS).  The service's OnStart event
registers
> the object with the ROT (based on the code you gave me).  The OnStop event
> Revokes it.

> I have a client application that I am trying to run on the same machine.
> When I try to do a GetActiveOLEObject, I recieve the 'Operation
Unavailable'
> error.  So, I tried what you said and used an

> Thank you very much for your help and time,

> Otherwise tip #19 on my site might help.

> --
> have fun
> Binh Ly
> http://www.techvanguards.com

> "A G" <aa...@ugomedia.com> wrote in message news:3b8ece02$1_1@dnews...
> > Tom (and anyone else paying attention),

> > I tried what you said, and I still recieve the 'Operation Unavailable'
> > error.  Here's the scoop...

> > I have a Service Application with an Automation Object attached to it.
> The
> > Automation Object has a class CoUMIEIS with an application name of
umieiss
> > (making the ProgID umieiss.CoUMIEIS).  The service's OnStart event
> registers
> > the object with the ROT (based on the code you gave me).  The OnStop
event
> > Revokes it.

> > I have a client application that I am trying to run on the same machine.
> > When I try to do a GetActiveOLEObject, I recieve the 'Operation
> Unavailable'
> > error.  So, I tried what you said and used an
> OLECheck(GetActiveObject...),
> > and recieved the same error.  I am using
> ProgIDToClassID('umieiss.CoUMIEIS')
> > to get the class ID.  Any ideas why I would still be recieving the
error?

> > Thank you very much for your help and time,