Undefined Type when returning an object from an Interface Method

[Thomas Tierney]

Hey all,

I am trying to return an object from a method call and cant figure out how to do it.

If I add the statment to my class

   INTERFACE ITEST GUID$("{6D7C6252-F8AE-4DCD-90A9-EA97A0C0ACC6}")
        INHERIT IUNKNOWN
        METHOD SAVESETTINGS ALIAS "Save"() AS OBJECT
        END METHOD
    END INTERFACE

I get an error that OBJECT is an undefined Type. I would much prefer to do a
AS MYNEWCLASSITEM but apparently that isnt supported.

Any help would be appreciated.
Thanks

[Steven Pringels 3]

Thomas,

What about ... As IDispatch ?

Cheers

Steven

[jcfuller]

I'm not quite sure what you are trying to do but:
AS ITEST


METHOD = OBJPTR(ME)

James

[Thomas Tierney]

I Tried with IDISPATCH and it allowed me to compile but the typelib created

interface IITEST : IUnknown {
IUnknown _stdcall Save();
};

which isnt IDISPATCH. when I switch to IDISPATCH for both Inherit and the method result I get

interface IITEST : IDispatch {
[id(0x00000101)]
HRESULT Save([out, retval] IDispatch** );
};

which is correct. So I must inherit IDISPATCH in the Interface in Order to return a dispatch object?

INTERFACE IITEST GUID$("{6D7C6252-F8AE-4DCD-90A9-EA97A0C0ACC6}")
        INHERIT IDISPATCH
        METHOD SAVESETTINGS ALIAS "Save"() AS IDISPATCH
        END METHOD
    END INTERFACE

[Steven Pringels 3]

Thomas,

You can always return either IUnknown or IDispatch regardless of the
class' heritage.

It depends on what you're instantiating in the class itself. F.i. if you have a
instance variable defined as IUnknown and obtain a reference from that,
the Save method could return the IUnknown pointer to the instantiated
variable. Same for IDispatch.

Cheers

[Thomas Tierney]

Hey Steven,

Problem is, in order for the TypeLib to have the correct information in it I must set the Interface inheritance to IDISPATCH and the return value to IDISPATCH. If the Interface is IUNKNOWN then even with the return Value is IDISPATCH it will only return IUNKNOWN.

And I have yet to find a TypeLib Def with

interface IITEST : IUnknown {
IUnknown _stdcall Save();
};