How can I expose multiple interfaces within a runtime class??

Question

I have a traditional DLL and encapsulate it with IInspectable. Within a runtime class, I only put a interface in the idl file. How can I modify my idl file to expose multiple interfaces within one runtime class and how to modify the class body or I only need to inherit multiple interfaces??

Answer 1

In your IDL file, you simply add the new interfaces to your runtimeclass declaration:

 

runtimeclass MyRuntimeClass

{

    [default]interface IMyInterface1;

    interface IMyInterface2;

}

This says that the object MyRuntimeClass implements the interfaces IMyInterface1 and IMyInterface2.  When MyRuntimeClass is used as a parameter in a method, the IMyInterface1 interface will be expected (it's what I call the "stand-in" interface for the runtime class.

Btw, the documentation for the low level (IDL) authoring experience has not yet been released at this time, we will be documenting it at a later time.

Answer 2

Thank you for replying, but if both of interfaces IMyInterface1 and IMyInterface2 all inherit from IInspectable, can I recognize the IMyInterface2 when MyRunTimeClass is used as a parameter in a method. If not, how can I change to IMyInterface2??

Can I write in this way

runtimeclass MyRuntimeClass

{

    interface IMyInterface1;

    interface IMyInterface2;

}

None of these interfaces with attribute [default], then can I use some method to query the interface I need?? just like queryinterface. Because I don't want the user can see the interfaces they don't need.