How to have access to the members of a class

[Roozbeh69]

Hi everybody I have written an ATL 3.0 project including two sample classes named CAttachment & CAttachments. These classes have interfaces IAttachment & IAttachments in order. IAttachments has got a method named "Item" that returns a result of the type of IAttachment. But before returning the IAttachment, I want to call some member functions of the CAttachment class to setup the IAttachment properly. I know how to create the IAttachment interface, but I don't know how to have access to the members of the CAttachment from the Item method. I will be thankful if anybody replies to me. Regards, Roozbeh.

[ian mariano]

It's a hack but you could cast your IAttachment interface to CAttachment and call the methods you desire.

CAttachment a = (CAttachment)piAttachment;
 
a->SomeMethodNotExposedInIAttachment();
 
pi->SomeMethodExposedByIAttachment();

Note, this won't work outside your implementation project as outside callers won't have access to the CAttachment class or any of its members not exposed by the IAttachment interface.

Ian Mariano - http://www.ian-space.com/
"We are all wave equations in the information matrix of the universe" - me

[Steve S]

How is the CAttachments object producing the interface IAttachment to return? Presumably you must be making a CAttachment object somewhere, or do you have them already created and you're just holding a list of the IAttachment interfaces? Steve S