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ATL: ATL events question

Hi,
I have a COM VC++ server which fires events and a VC++ client which catching the event using an ATL sink (IDispEventImpl). I have a SINK_MAP in the client, and the events are recieved OK.
My question is:
In the client I'm using #import to the .tlb/.dll of the server. If I do not use "named_guids" attribute, then I do
not get the events. Are the "named_guids" is a must attribute to recieve events ???

If it is a must then I have a second problem:
My server contains several Dll's, and inorder to make the client simpler I use the "rename_namespace" attribute to one common name:
#import "MyDll1.tlb" rename_namespace ("MyProj")
#import "MyDll2.tlb" rename_namespace ("MyProj")
#import "MyDll3.tlb" rename_namespace ("MyProj")
Now, when trying to add the "named_guids" attribute to each one of the "import" lines, I fail in compilation:
"'LIBID_MyProj' : redefinition; multiple initialization... "

Can someone please advise ???
thanks,
Yoav.

Khalid Omar

Hi,

I'm not that expert in COM programming, but I have a suggestion. Try to put the imports in the client code like this:

#import "MyDll1.tlb" rename_namespace ("MyProj1")
#import "MyDll2.tlb" rename_namespace ("MyProj2")
#import "MyDll3.tlb" rename_namespace ("MyProj3")

Then put:

using namespace MyProj1;
using namespace MyProj2;
using namespace MyProj3;

Then add the "named_guids" attribute and try to compile.

Thanks,
Khalid Omar.

yoavo

ASKER

This will probably work, but as I mentioned before I want all the Dll's to be renamed to one name.

_ys_

Your problem is the precise reason why libraries have their own namespaces in the first place.

[un]Fortunately, there is a solution to your problem.

[this post may be wrapped - if so unwrap it!!]

#import "MyDll1.tlb" rename_namespace ("MyProj") rename("LIBID_MyProj","LIBID_MyProj1") named_guids
#import "MyDll2.tlb" rename_namespace ("MyProj") rename("LIBID_MyProj","LIBID_MyProj2") named_guids
#import "MyDll3.tlb" rename_namespace ("MyProj") rename("LIBID_MyProj","LIBID_MyProj3") named_guids

yoavo

ASKER

I tried it but it doesn't work. I still get the compile error message.

_ys_

With the exact same error ??

"'LIBID_MyProj' : redefinition; multiple initialization... "

yoavo

ASKER

Yes.

_ys_

Try excluding the LIBIDs, as they're generally never referenced anyway.

[this post may be wrapped - if so unwrap it!!]

#import "MyDll1.tlb" rename_namespace ("MyProj") exclude("LIBID_MyProj") named_guids
#import "MyDll2.tlb" rename_namespace ("MyProj") exclude("LIBID_MyProj") named_guids
#import "MyDll3.tlb" rename_namespace ("MyProj") exclude("LIBID_MyProj") named_guids

yoavo

ASKER

I still get the same error...

_ys_

Just noticed an error in my orignal post. Sorry.

[this post may be wrapped - if so unwrap it!!]

#import "MyDll1.tlb" rename_namespace ("MyProj") rename("MyProjLib","MyProjLib1") named_guids
#import "MyDll2.tlb" rename_namespace ("MyProj") rename("MyProjLib","MyProjLib2") named_guids
#import "MyDll3.tlb" rename_namespace ("MyProj") rename("MyProjLib","MyProjLib3") named_guids

The LIBID don't even exist yet, so you can't rename them. It should be the name of the library itself.

In your original IDL, you should have:
[
uuid(...),
version(x.x),
helpstring("blah Type Library")
]
library MyProjLib //*** this is the name you want to specify for rename
{
...
}

yoavo

ASKER

"MyProjLib" is not written in any idl !!!
"MyProj" is just a name that the client renamed for easy access to the tlb's of the client.

_ys_

Yes, but those original tlb files must have been generated from source. It's that source that you need to view, to ascertain what name it is you're wanting to rename in the first place.

It is likely to be the original namespace name.

yoavo

ASKER

I tried it. still I get the same error...

ASKER CERTIFIED SOLUTION

_ys_

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