How to provide access to type information from an MFC automation server at run time (185720)

MORE INFORMATION

The automation object in the following steps refers to a CCmdTarget derived object with automation enabled.

Step-by-step example

1. Place the DECLARE_OLETYPELIB macro in the automation object's header file within the class definition.
2. Place the IMPLEMENT_OLETYPELIB macro in the automation object's implementation file at global scope.
3. Override CCmdTarget::GetDispatchIID() in your derived class, and then return the IID of the primary dispatch interface.

   Sample code

   :

         // In the header file for the automation object, say CmyAutoObject.
         virtual BOOL GetDispatchIID(IID* pIID);
   
         // In the implementation file for CmyAutoObject.
         BOOL CMyAutoObject::GetDispatchIID(IID* pIID)
         {
            *pIID = IID_IMyAutoObject;
            return TRUE;
         }
   					

4. Call EnableTypeLib(), in the constructor for the automation object.

Make sure that the type library is registered using AfxOleRegisterTypeLib() or RegisterTypeLib(), or that the type library is available as a resource in the .dll or .exe file. For more information about how to add the type library as a resource, click the following article number to view the article in the Microsoft Knowledge Base: (c) Microsoft Corporation 1998, All Rights Reserved. Contributions by Jaganathan Thangavelu, Microsoft Corporation