Need help with DCOM

MCDYFM · Joined: 04 Oct 2007 Posts: 8

Hi,

I am having problem accessing my vb6 ActiveX.exe from a client host. I read
all the responses in this thread but have not been able to get it working
yet.

I have no problem connecting to the ActiveX from my client app as long as
it's on the same PC. Once I register the activeX on my server (std win2k)
and run the dcomcnfg, it shows one of the public classes only (the activeX
exposes 7 classes). Is this correct?

Also, in the component services, I do not find a DCOM config as noted by
Steve Stunning. Is it because I am running VB6 professional ? DO I need the
Enterprize version for DCOM to work?

I was able to access my activeX from another PC using Remote Automation, but
it does not support events.

Thanx in advance,
-Farid

Archived from group: microsoft>public>vb>com

Tony Proctor · Joined: 04 Oct 2007 Posts: 1051

An ActiveX EXE only requires one AppID, and so only one of the public
classes is shown. dcomcnfg uses the Class ID of the first public class in
finds in the component in order to create an AppID (it re-uses the same
GUID). You would actually have a problem if you saw more than one class
because it would mean that you had multiple editions of your component
registered on that machine.

Under W2K, dcomcnfg.exe had to be invoked manually (usually from the
Start->Run menu). Only later on did it appear under Component Services.

Tony Proctor

"MCDYFM" wrote in message
news:%23OcRSFN3GHA.4972@TK2MSFTNGP03.phx.gbl...
> Hi,
>
> I am having problem accessing my vb6 ActiveX.exe from a client host. I
read
> all the responses in this thread but have not been able to get it working
> yet.
>
> I have no problem connecting to the ActiveX from my client app as long as
> it's on the same PC. Once I register the activeX on my server (std win2k)
> and run the dcomcnfg, it shows one of the public classes only (the activeX
> exposes 7 classes). Is this correct?
>
> Also, in the component services, I do not find a DCOM config as noted by
> Steve Stunning. Is it because I am running VB6 professional ? DO I need
the
> Enterprize version for DCOM to work?
>
> I was able to access my activeX from another PC using Remote Automation,
but
> it does not support events.
>
> Thanx in advance,
> -Farid
>
>

MCDYFM · Joined: 04 Oct 2007 Posts: 8

Thank you Tony for clarify the DCOM config issue.

My client app communicates with my out-of-process ActiveX component as long
as both reside on the same PC; But when I used OLEView to look at my ActiveX
TypeLib, it fails & displays error "Library Not registered". Would you
shed some light on this?

Thanx,
-Farid

"Tony Proctor" wrote in message
news:%23ijZDsN3GHA.476@TK2MSFTNGP06.phx.gbl...
> An ActiveX EXE only requires one AppID, and so only one of the public
> classes is shown. dcomcnfg uses the Class ID of the first public class in
> finds in the component in order to create an AppID (it re-uses the same
> GUID). You would actually have a problem if you saw more than one class
> because it would mean that you had multiple editions of your component
> registered on that machine.
>
> Under W2K, dcomcnfg.exe had to be invoked manually (usually from the
> Start->Run menu). Only later on did it appear under Component Services.
>
> Tony Proctor
>
> "MCDYFM" wrote in message
> news:%23OcRSFN3GHA.4972@TK2MSFTNGP03.phx.gbl...
> > Hi,
> >
> > I am having problem accessing my vb6 ActiveX.exe from a client host. I
> read
> > all the responses in this thread but have not been able to get it
working
> > yet.
> >
> > I have no problem connecting to the ActiveX from my client app as long
as
> > it's on the same PC. Once I register the activeX on my server (std
win2k)
> > and run the dcomcnfg, it shows one of the public classes only (the
activeX
> > exposes 7 classes). Is this correct?
> >
> > Also, in the component services, I do not find a DCOM config as noted by
> > Steve Stunning. Is it because I am running VB6 professional ? DO I need
> the
> > Enterprize version for DCOM to work?
> >
> > I was able to access my activeX from another PC using Remote Automation,
> but
> > it does not support events.
> >
> > Thanx in advance,
> > -Farid
> >
> >
>
>

Brian Muth · Joined: 04 Oct 2007 Posts: 18

You need to register the type library of the ActiveX component on the client
box.

Copy the VB6 exe to the client machine, and execute it once from the command
line, as in:

MyVB6.exe /regserver

Brian

"MCDYFM" wrote in message $%23MP3GHA.1256@TK2MSFTNGP04.phx.gbl...
> Thank you Tony for clarify the DCOM config issue.
>
> My client app communicates with my out-of-process ActiveX component as
> long
> as both reside on the same PC; But when I used OLEView to look at my
> ActiveX
> TypeLib, it fails & displays error "Library Not registered". Would you
> shed some light on this?
>
> Thanx,
> -Farid
>
> "Tony Proctor" wrote in
> message
> news:%23ijZDsN3GHA.476@TK2MSFTNGP06.phx.gbl...
>> An ActiveX EXE only requires one AppID, and so only one of the public
>> classes is shown. dcomcnfg uses the Class ID of the first public class in
>> finds in the component in order to create an AppID (it re-uses the same
>> GUID). You would actually have a problem if you saw more than one class
>> because it would mean that you had multiple editions of your component
>> registered on that machine.
>>
>> Under W2K, dcomcnfg.exe had to be invoked manually (usually from the
>> Start->Run menu). Only later on did it appear under Component Services.
>>
>> Tony Proctor
>>
>> "MCDYFM" wrote in message
>> news:%23OcRSFN3GHA.4972@TK2MSFTNGP03.phx.gbl...
>> > Hi,
>> >
>> > I am having problem accessing my vb6 ActiveX.exe from a client host. I
>> read
>> > all the responses in this thread but have not been able to get it
> working
>> > yet.
>> >
>> > I have no problem connecting to the ActiveX from my client app as long
> as
>> > it's on the same PC. Once I register the activeX on my server (std
> win2k)
>> > and run the dcomcnfg, it shows one of the public classes only (the
> activeX
>> > exposes 7 classes). Is this correct?
>> >
>> > Also, in the component services, I do not find a DCOM config as noted
>> > by
>> > Steve Stunning. Is it because I am running VB6 professional ? DO I need
>> the
>> > Enterprize version for DCOM to work?
>> >
>> > I was able to access my activeX from another PC using Remote
>> > Automation,
>> but
>> > it does not support events.
>> >
>> > Thanx in advance,
>> > -Farid
>> >
>> >
>>
>>
>
>

MCDYFM · Joined: 04 Oct 2007 Posts: 8

I was running both the client & server on the same PC; Therefore I would
expect the TBL to be registered. Also my Client app project under VB6 IDE
shows the intellisense lists so IDE must have found the TBL. I am wrong to
think the TBL must already be registered if the OLEView lists the ActiveX
friendly name under the TLBs branch!

-Farid

"Brian Muth" wrote in message$gIFbP3GHA.2152@TK2MSFTNGP06.phx.gbl...
> You need to register the type library of the ActiveX component on the
client
> box.
>
> Copy the VB6 exe to the client machine, and execute it once from the
command
> line, as in:
>
> MyVB6.exe /regserver
>
> Brian
>
> "MCDYFM" wrote in message
> $%23MP3GHA.1256@TK2MSFTNGP04.phx.gbl...
> > Thank you Tony for clarify the DCOM config issue.
> >
> > My client app communicates with my out-of-process ActiveX component as
> > long
> > as both reside on the same PC; But when I used OLEView to look at my
> > ActiveX
> > TypeLib, it fails & displays error "Library Not registered". Would you
> > shed some light on this?
> >
> > Thanx,
> > -Farid
> >
> > "Tony Proctor" wrote in
> > message
> > news:%23ijZDsN3GHA.476@TK2MSFTNGP06.phx.gbl...
> >> An ActiveX EXE only requires one AppID, and so only one of the public
> >> classes is shown. dcomcnfg uses the Class ID of the first public class
in
> >> finds in the component in order to create an AppID (it re-uses the same
> >> GUID). You would actually have a problem if you saw more than one class
> >> because it would mean that you had multiple editions of your component
> >> registered on that machine.
> >>
> >> Under W2K, dcomcnfg.exe had to be invoked manually (usually from the
> >> Start->Run menu). Only later on did it appear under Component Services.
> >>
> >> Tony Proctor
> >>
> >> "MCDYFM" wrote in message
> >> news:%23OcRSFN3GHA.4972@TK2MSFTNGP03.phx.gbl...
> >> > Hi,
> >> >
> >> > I am having problem accessing my vb6 ActiveX.exe from a client host.
I
> >> read
> >> > all the responses in this thread but have not been able to get it
> > working
> >> > yet.
> >> >
> >> > I have no problem connecting to the ActiveX from my client app as
long
> > as
> >> > it's on the same PC. Once I register the activeX on my server (std
> > win2k)
> >> > and run the dcomcnfg, it shows one of the public classes only (the
> > activeX
> >> > exposes 7 classes). Is this correct?
> >> >
> >> > Also, in the component services, I do not find a DCOM config as noted
> >> > by
> >> > Steve Stunning. Is it because I am running VB6 professional ? DO I
need
> >> the
> >> > Enterprize version for DCOM to work?
> >> >
> >> > I was able to access my activeX from another PC using Remote
> >> > Automation,
> >> but
> >> > it does not support events.
> >> >
> >> > Thanx in advance,
> >> > -Farid
> >> >
> >> >
> >>
> >>
> >
> >
>
>

Brian Muth · Joined: 04 Oct 2007 Posts: 18

"MCDYFM" wrote in message @TK2MSFTNGP05.phx.gbl...
>I was running both the client & server on the same PC; Therefore I would
> expect the TBL to be registered. Also my Client app project under VB6 IDE
> shows the intellisense lists so IDE must have found the TBL. I am wrong
> to
> think the TBL must already be registered if the OLEView lists the ActiveX
> friendly name under the TLBs branch!
>

But you just said that OLEView is giving the message "Library not
registered.". I've never known this error message to be inaccurate. You
might have a type library registered, but in may be the wrong version.

Remember, every time you compile the VB6 server, by default, you are
generating new GUID's for the Type Library, and the TLB needs to be
re-registered on every client's machine. Of course, this is happening
automatically on the server, so the client will find the TLB if it is run
locally.

You can prevent new GUID's being generating by setting the Project's
properties to "Binary Compatibility" under the Component tag.

Hope this helps to clarify.

Brian

MCDYFM · Joined: 04 Oct 2007 Posts: 8

I am not familiar with workings of OLEView, but would guess it loads the
HKEY_CLASSES_ROOT\TypeLib branch; I do see my server on that branch; I do
use Binary Comaptibility.

Wouldn't the client app blow if the TBL was not the one it was using? Can I
manually remove this TypeLib from registery and re-register the server
component?

-Farid

"Brian Muth" wrote in message%23Q3GHA.3516@TK2MSFTNGP06.phx.gbl...
>
> "MCDYFM" wrote in message
> @TK2MSFTNGP05.phx.gbl...
> >I was running both the client & server on the same PC; Therefore I would
> > expect the TBL to be registered. Also my Client app project under VB6
IDE
> > shows the intellisense lists so IDE must have found the TBL. I am wrong
> > to
> > think the TBL must already be registered if the OLEView lists the
ActiveX
> > friendly name under the TLBs branch!
> >
>
> But you just said that OLEView is giving the message "Library not
> registered.". I've never known this error message to be inaccurate. You
> might have a type library registered, but in may be the wrong version.
>
> Remember, every time you compile the VB6 server, by default, you are
> generating new GUID's for the Type Library, and the TLB needs to be
> re-registered on every client's machine. Of course, this is happening
> automatically on the server, so the client will find the TLB if it is run
> locally.
>
> You can prevent new GUID's being generating by setting the Project's
> properties to "Binary Compatibility" under the Component tag.
>
> Hope this helps to clarify.
>
> Brian
>
>

Brian Muth · Joined: 04 Oct 2007 Posts: 18

"MCDYFM" wrote in message @TK2MSFTNGP03.phx.gbl...
>I am not familiar with workings of OLEView, but would guess it loads the
> HKEY_CLASSES_ROOT\TypeLib branch; I do see my server on that branch; I
> do
> use Binary Comaptibility.
>
> Wouldn't the client app blow if the TBL was not the one it was using?

No, it might say "Library not registered", because indeed the correct
library is not registered.

> Can I
> manually remove this TypeLib from registery and re-register the server
> component?
>

Have you not even tried what I suggested?

Brian
>

MCDYFM · Joined: 04 Oct 2007 Posts: 8

Your only suggestion was to register the TBL on the client PC. My client PC
is also my server!
Did I mis-understand your comment?

Whenever I copy the .Exe onto the server, my batch files unreg exiting
components, copy new ones and register them.

-Farid

"Brian Muth" wrote in message@TK2MSFTNGP02.phx.gbl...
>
> "MCDYFM" wrote in message
> @TK2MSFTNGP03.phx.gbl...
> >I am not familiar with workings of OLEView, but would guess it loads the
> > HKEY_CLASSES_ROOT\TypeLib branch; I do see my server on that branch; I
> > do
> > use Binary Comaptibility.
> >
> > Wouldn't the client app blow if the TBL was not the one it was using?
>
> No, it might say "Library not registered", because indeed the correct
> library is not registered.
>
> > Can I
> > manually remove this TypeLib from registery and re-register the server
> > component?
> >
>
> Have you not even tried what I suggested?
>
> Brian
> >
>
>

Brian Muth · Joined: 04 Oct 2007 Posts: 18

This thread is a little confusing. Please confirm if I have this right....

You develop and compile both the client program and the server executable on
your client workstation. Testing locally works.

You then copy the server executable to another box and register the
executable. Running the client program from your client workstation fails.
Do you get an error message?

Running OLEVIEW on the server box produces the message "Library not
registered" when you try to instantiate the server object.

Have I got it correct?

If so, then the server executable did not register correctly. Sometimes some
old detritus in the registry could be the problem. A simple step is to
manually remove all references to your object in the server registry
(scanning for for example, or scan for the progid.) and
then re-register. If OLEVIEW cannot instantiate the object, then nothing
else will.

HTH

Brian

rogerio silva · Joined: 04 Oct 2007 Posts: 1

"Brian Muth" escreveu na mensagem$gIFbP3GHA.2152@TK2MSFTNGP06.phx.gbl...
> You need to register the type library of the ActiveX component on the
client
> box.
>
> Copy the VB6 exe to the client machine, and execute it once from the
command
> line, as in:
>
> MyVB6.exe /regserver
>
> Brian
>
> "MCDYFM" wrote in message
> $%23MP3GHA.1256@TK2MSFTNGP04.phx.gbl...
> > Thank you Tony for clarify the DCOM config issue.
> >
> > My client app communicates with my out-of-process ActiveX component as
> > long
> > as both reside on the same PC; But when I used OLEView to look at my
> > ActiveX
> > TypeLib, it fails & displays error "Library Not registered". Would you
> > shed some light on this?
> >
> > Thanx,
> > -Farid
> >
> > "Tony Proctor" wrote in
> > message
> > news:%23ijZDsN3GHA.476@TK2MSFTNGP06.phx.gbl...
> >> An ActiveX EXE only requires one AppID, and so only one of the public
> >> classes is shown. dcomcnfg uses the Class ID of the first public class
in
> >> finds in the component in order to create an AppID (it re-uses the same
> >> GUID). You would actually have a problem if you saw more than one class
> >> because it would mean that you had multiple editions of your component
> >> registered on that machine.
> >>
> >> Under W2K, dcomcnfg.exe had to be invoked manually (usually from the
> >> Start->Run menu). Only later on did it appear under Component Services.
> >>
> >> Tony Proctor
> >>
> >> "MCDYFM" wrote in message
> >> news:%23OcRSFN3GHA.4972@TK2MSFTNGP03.phx.gbl...
> >> > Hi,
> >> >
> >> > I am having problem accessing my vb6 ActiveX.exe from a client host.
I
> >> read
> >> > all the responses in this thread but have not been able to get it
> > working
> >> > yet.
> >> >
> >> > I have no problem connecting to the ActiveX from my client app as
long
> > as
> >> > it's on the same PC. Once I register the activeX on my server (std
> > win2k)
> >> > and run the dcomcnfg, it shows one of the public classes only (the
> > activeX
> >> > exposes 7 classes). Is this correct?
> >> >
> >> > Also, in the component services, I do not find a DCOM config as noted
> >> > by
> >> > Steve Stunning. Is it because I am running VB6 professional ? DO I
need
> >> the
> >> > Enterprize version for DCOM to work?
> >> >
> >> > I was able to access my activeX from another PC using Remote
> >> > Automation,
> >> but
> >> > it does not support events.
> >> >
> >> > Thanx in advance,
> >> > -Farid
> >> >
> >> >
> >>
> >>
> >
> >
>
>

MCDYFM · Joined: 04 Oct 2007 Posts: 8

Good Morning Brian,

Thank you for you comments. Please read on...

"Brian Muth" wrote in message@TK2MSFTNGP03.phx.gbl...
> This thread is a little confusing. Please confirm if I have this right....
>
> You develop and compile both the client program and the server executable
on
> your client workstation. Testing locally works.

Yes; But I used my server wokstation instead.

>
> You then copy the server executable to another box and register the
> executable. Running the client program from your client workstation fails.
> Do you get an error message?

1- I then make a server installation package for the client-side that
included all dependent files, MyServer.VBR & MyServer.TBL , but did not
include MyServer.Exe.
2- I installed this on the client PC and provided my Server PC's name as the
Network address during install.
3- Installed client app on client PC and ran it.
4- The error msg "Run-time error 0x800706F4: Method '~' of object '~'
failed"

>
> Running OLEVIEW on the server box produces the message "Library not
> registered" when you try to instantiate the server object.

I then ran OLEVIEW on the server PC and located my server under Type Library
branch and Double-Click to see the content of the TBL; This is when I got
the error "Library not registered" .

>
> Have I got it correct?
>
> If so, then the server executable did not register correctly. Sometimes
some
> old detritus in the registry could be the problem. A simple step is to
> manually remove all references to your object in the server registry
> (scanning for for example, or scan for the progid.)
and
> then re-register. If OLEVIEW cannot instantiate the object, then nothing
> else will.

Before starting this thread, I did what you are suggesting; I even went an
step further and removed all the GUID (for all the classes, interfaces,
ProgID, AppID) and then rebuilt my MyServer and re-register it bycalling
MyServer.exe /regserver. Since I have not yet shipped any version of
MyServer (v1.1), my next step was repeat the above, break binary
compatibility, delete MyServer.exe and rebuild everything as v1.0

>
> HTH
>
> Brian
>

Thanx,
-Farid

Tony Proctor · Joined: 04 Oct 2007 Posts: 1051

I'm confused too

All I can do is re-iterate what Brian has already said: the DCOM Server
(i.e. the ActiveX EXE) has to be registered on both machines, the client and
the server. Also, it must be the same edition registered on both machines.

If you're saying you already do this then I would check the two Registries
client and server). Compare the Class IDs and Typelib IDs for your ActiveX
EXE in the two Registries.

Tony Proctor

"Brian Muth" wrote in message@TK2MSFTNGP03.phx.gbl...
> This thread is a little confusing. Please confirm if I have this right....
>
> You develop and compile both the client program and the server executable
on
> your client workstation. Testing locally works.
>
> You then copy the server executable to another box and register the
> executable. Running the client program from your client workstation fails.
> Do you get an error message?
>
> Running OLEVIEW on the server box produces the message "Library not
> registered" when you try to instantiate the server object.
>
> Have I got it correct?
>
> If so, then the server executable did not register correctly. Sometimes
some
> old detritus in the registry could be the problem. A simple step is to
> manually remove all references to your object in the server registry
> (scanning for for example, or scan for the progid.)
and
> then re-register. If OLEVIEW cannot instantiate the object, then nothing
> else will.
>
> HTH
>
> Brian
>
>

Brian Muth · Joined: 04 Oct 2007 Posts: 18

Sorry, your comments continue to confuse me. Perhaps these two discussions
will help you.

http://groups.google.com/group/microsoft.public.vb.enterprise/browse_thread/thread/ef3a5bed42dba485/c586117970b34e40?lnk=st&q=&rnum=1&hl=en#c586117970b34e40

http://groups.google.ca/group/microsoft.public.vb.general.discussion/browse_thread/thread/8b4e7b8c0e307140/78a1c98fcbd8044d?lnk=st&q=vbr+tbl&rnum=1#78a1c98fcbd8044d

Good luck!

Brian

MCDYFM · Joined: 04 Oct 2007 Posts: 8

I am new to DCOM and most likely not configuring it correctly. With
DCOMCNFG, what should I set the server application properties to (the least
restrictive) ensuring connection from the client side?

-Farid

"Tony Proctor" wrote in message
news:%23ijZDsN3GHA.476@TK2MSFTNGP06.phx.gbl...
> An ActiveX EXE only requires one AppID, and so only one of the public
> classes is shown. dcomcnfg uses the Class ID of the first public class in
> finds in the component in order to create an AppID (it re-uses the same
> GUID). You would actually have a problem if you saw more than one class
> because it would mean that you had multiple editions of your component
> registered on that machine.
>
> Under W2K, dcomcnfg.exe had to be invoked manually (usually from the
> Start->Run menu). Only later on did it appear under Component Services.
>
> Tony Proctor
>
> "MCDYFM" wrote in message
> news:%23OcRSFN3GHA.4972@TK2MSFTNGP03.phx.gbl...
> > Hi,
> >
> > I am having problem accessing my vb6 ActiveX.exe from a client host. I
> read
> > all the responses in this thread but have not been able to get it
working
> > yet.
> >
> > I have no problem connecting to the ActiveX from my client app as long
as
> > it's on the same PC. Once I register the activeX on my server (std
win2k)
> > and run the dcomcnfg, it shows one of the public classes only (the
activeX
> > exposes 7 classes). Is this correct?
> >
> > Also, in the component services, I do not find a DCOM config as noted by
> > Steve Stunning. Is it because I am running VB6 professional ? DO I need
> the
> > Enterprize version for DCOM to work?
> >
> > I was able to access my activeX from another PC using Remote Automation,
> but
> > it does not support events.
> >
> > Thanx in advance,
> > -Farid
> >
> >
>
>

DCOM RaiseEvent What's the way for a DCOM server to raise an event for ALL its clients? Do the clients have to poll? The general idea is that some computer does something, and will then notify its peers that they should update their display. Thanks for your help.

DCOM with IIS 6.0 Hi there, In our 2003 server, the web application cannot access the DCOM even I added Launch Permission in DCOM Config for the object (written in VB 6). Does anyone why? Thanks, Alex

DCOM When I am developing a program in VB and I reference COM objects on remote servers why does VB pull the dll into my program when I compile it. Doesn't this defeat the purpose of DCOM. I want to develop a program that uses a COM object registered in COM+

convert COM dll to DCOM How to convert COM dll to DCOM and what is the syntax to call that DCOM. I have done this with Visual FoxPro but not with VB 6. Please advise ? I.S.S. Yuba,CA

DCOM Error 458 (again) Hi, I posted a few days ago and got a few replies which I thank respondents for. Problem still here, but I would like to re-phrase the problem in the hope that presenting it differently might spark some new ideas. So... I have a DCOM executable running on