troubleshooting Question

Calling VB COM+ component from C++ COM+ Component

Avatar of paulcurtis
paulcurtis asked on
C++Microsoft Development
6 Comments1 Solution1415 ViewsLast Modified:
Hi

Ive currently got 2 COM+ components that need to communicate with each other.

As far as i can see to make a VB COM+ component i just need to add the following to my class module.

Private oContext As ObjectContext

Implements ObjectControl

Private Sub ObjectControl_Activate()
   Set oContext = GetObjectContext()
End Sub

Private Sub ObjectControl_Deactivate()
    Set oContext = Nothing
End Sub

Private Function ObjectControl_CanBePooled() As Boolean

ObjectControl_CanBePooled = False
End Function


This seems to work fine and i can add the component using the component services module. Ive tested the componet from asp and it works fine.

Ive also created a c++ COM+ componet using the ATL wizard and adding an MTS Object. This also works fine from ASP.

The problem arises when i try and create an instance of the VB object from c++ using the CoCreateInstance function, it always returns 80004002 (E_NOINTERFACE)

Has anybody got an idea what may be going wrong or can point me to some articals/tutorials that cover the topic

Thanks in advance

Paul
ASKER CERTIFIED SOLUTION
Roshan Davis

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