Re: IDocHostUIHandler GetExternal question

eselk@xxxxxxxxxxxx wrote:
If I implement IDocHostUIHandler::GetExternal, can the IDispatch
object I return, have methods that return other IDispatch objects, and
can objects from JavaScript be passed as parameters as well?

Yes and yes.

So in JavaScript I would do something like this:

obj = window.external.createMyObject();
obj.DoSomething();

Quite possible.

Does JavaScript just treat all objects as IDispatch

Yes.

how does
it know what type of object/variable the "createMyObject" function
returned?

It doesn't know nor care.

Well, I guess I might know the answer to that, since COM
uses variant params, and my Invoke function sets the variant type that
it returns... I guess that is how JavaScript knows the variable type,
right?

Well, that's how it distinguishes an object from a primitive value like
an integer or a string. But all objects look the same to it (stored in
VARIANT of type VT_DISPATCH).
--
With best wishes,
Igor Tandetnik

With sufficient thrust, pigs fly just fine. However, this is not
necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
overhead. -- RFC 1925


.

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