COM+ & multithreading

[dok]

Hello

Could anyone help me with multithreading at COM+ ActiveXDll? I've coded ActiveXDll on VB, which start PowerPoint session and process .ppt file. But i need to start 2 or more PowerPoint sessions at once. Does ActiveXDll on VB support pooling or could anyone propose another solution ?

Thanks,
Dok

[Cakkie]

VB COM+ componetns cannot be pooled, because they are single threaded. Object pooling requires multi threading. On the other hand, you can start more then one instance of a dll (each in its own process and each with it's own thread). So two instances of the same dll can run at the same time. You must however check if they are not using the same powerpoint session, cause this this can lead to unwanted results.

Tom Cannaerts
[email protected]

Programming today is a race between software engineers striving to build bigger and better idot-proof programs, and the universe trying to produce bigger and better idiots. So far, the universe is winning -- Rich Cook

[dok]

Thank you for answer. But can you describe how to start more then one instance of a dll in details ?

Thanks,
Konstantin

[Cakkie]

It just creating two objects of the dll

dim obj1 as MyDll.MyInterface
dim obj2 as MyDll.MyInterface

set obj1 = CreateObject("MyDll.MyObject")
set obj2 = CreateObject("MyDll.MyObject")





Tom Cannaerts
[email protected]

Programming today is a race between software engineers striving to build bigger and better idot-proof programs, and the universe trying to produce bigger and better idiots. So far, the universe is winning -- Rich Cook

[Jim Bassett]

Can you describe how to make use of an already running instance of a COM+ object.