COM Components

[Jihad Haddad]

Hi
I have an out-of-proc COM Component (an exe file), and want to have access
to its interfaces through LabView. This seems impossible, even though I have
seen that it is possible to access interfaces from an in-proc COM component
(a DLL file).
Is there any way in which I can do that.

I have the feeling that the COM component can be accessed, if just I can get
labview to see the interfaces. Is there any way to specify the TLB file of
my COM component, or insert the interfaces manually?

Thank you very much in advance

Jihad Haddad

[Greg_McKaskle2]

> I have an out-of-proc COM Component (an exe file), and want to have access
> to its interfaces through LabView. This seems impossible, even though I have
> seen that it is possible to access interfaces from an in-proc COM component
> (a DLL file).
> Is there any way in which I can do that.
>
> I have the feeling that the COM component can be accessed, if just I can get
> labview to see the interfaces. Is there any way to specify the TLB file of
> my COM component, or insert the interfaces manually?
>


Try dropping an Automation Open node, right click and browse for the TLB
or the class definition in the list of registered classes. From there
you will want to use the invoke node to call methods and the property
node to read/write properties. The Active
X nodes can deal with many COM
interfaces, but they restrict the datatypes to those covered by automation.

Greg McKaskle

[Jihad Haddad]

Thanks for the answer, but this is exactly what I have been trying to do
without any luck.
The problem as I see it is that it is an out-of-proc COM component. I can
easily invoke methods on in-proc COM components, that is components in a DLL
file, but not with out-of-proc components (which is components in an EXE
file).

A solution would be to implement an in-proc COM component that calls my
out-of-proc component, and then include that into Labview. But this I would
like to avoid.

I hope I can get some other suggestions from this news group.

Thank you in advance
Jihad Haddad

"Greg McKaskle" wrote in message
news:3CC18B65.4060300@austin.rr.com...
> > I have an out-of-proc COM Component (an exe file), and want to have
access
>
> to its interfaces through LabView. This seems impossible, even though I
have
> > seen that it is possible to access interfaces from an in-proc COM
component
> > (a DLL file).
> > Is there any way in which I can do that.
> >
> > I have the feeling that the COM component can be accessed, if just I can
get
> > labview to see the interfaces. Is there any way to specify the TLB file
of
> > my COM component, or insert the interfaces manually?
> >
>
>
> Try dropping an Automation Open node, right click and browse for the TLB
> or the class definition in the list of registered classes. From there
> you will want to use the invoke node to call methods and the property
> node to read/write properties. The ActiveX nodes can deal with many COM
> interfaces, but they restrict the datatypes to those covered by
automation.
>
> Greg McKaskle
>

[Greg_McKaskle2]

> Thanks for the answer, but this is exactly what I have been trying to do
> without any luck.
> The problem as I see it is that it is an out-of-proc COM component. I can
> easily invoke methods on in-proc COM components, that is components in a DLL
> file, but not with out-of-proc components (which is components in an EXE
> file).
>
> A solution would be to implement an in-proc COM component that calls my
> out-of-proc component, and then include that into Labview. But this I would
> like to avoid.
>


Out of proc servers are initialized with an Open, and then accessed
through property and invoke nodes, then closed with the close node.
This is the way it works with Excel and TestStand for example. Make
sure that your component is proper
ly registered, and describe in more
detail where this fails, otherwise it is difficult to determine what is
going wrong.

Greg McKaskle

[wiebe@CARYA]

Hi,

You can call external libraries with a Call Library Function.

This is usually used with .dll extensions, but also works with .ocx and
..exe. Only backdraw is that you have to do the input and output type
definitions yourself.

The library functions are recognised automaticcly, but only if you use the
'Browse' button.

Regards,

Wiebe.



"Jihad Haddad" wrote in message
news:3cbfd117$0$251$edfadb0f@dspool01.news.tele.dk...
> Hi
> I have an out-of-proc COM Component (an exe file), and want to have access
> to its interfaces through LabView. This seems impossible, even though I
have
> seen that it is possible to access interfaces from an in-proc COM
component
> (a DLL file).
> Is there any way in which I can do that.
>
> I have the
feeling that the COM component can be accessed, if just I can
get
> labview to see the interfaces. Is there any way to specify the TLB file of
> my COM component, or insert the interfaces manually?
>
> Thank you very much in advance
>
> Jihad Haddad
>
>