Why VB can not Implements the interface?

[noho]

I define a interface.
Then reference the TLB and implement it in VB use statement "Implements".
But IView dose not show in class list.
Why?
Thanks for any suggestion.

[
object,
uuid(319E85A1-E279-11D3-9D78-00A0C9D4D5F3),
dual,
oleautomation,
helpstring("IView Interface"),
pointer_default(unique)
]
interface IView : IDispatch
{
[propget, id(1), helpstring("property ID")] HRESULT ID([out, retval] long *pVal);
[propput, id(1), helpstring("property ID")] HRESULT ID([in] long newVal);
[id(2), helpstring("method Create")] HRESULT Create([in]IFrame * parent);
[propget, id(3), helpstring("property hWnd")] HRESULT hWnd([out, retval] long *pVal);
[id(4), helpstring("method SetExtent")] HRESULT SetExtent([in]int left,[in]int top, [in]int width, [in]int height);
[id(5), helpstring("method Destroy")] HRESULT Destroy();
[id(6), helpstring("method Show")] HRESULT Show();
[id(7), helpstring("method Hide")] HRESULT Hide();
[id(8), helpstring("method GetMenu")] HRESULT GetMenu([out]long * hMenu);
[id(9), helpstring("method InvokeCommand")] HRESULT InvokeCommand([in]long ID);
[id(10), helpstring("method UpdateCommand")] HRESULT UpdateCommand([in]long ID,[in] ICommandUI * pCommandUI);
[id(11), helpstring("method GetToolbar")] HRESULT GetToolbar([out]VARIANT * text,[out]VARIANT * commandid,[out] long * bmpN,[out] long * bmpH,[out] long * bmpD);
[id(12), helpstring("method GetStartButton")] HRESULT GetStartButton([out]BSTR * text,[out] long * imgN,[out] long * himgH,[out] long * imgD);
};

[Johnny101]

I'm not sure that VB will do what you are looking for. It, as of today, doesn't support inheritence. But you can get very close using interfaces, but they have to be implemented in a special way. Check out www.stlvbug.org and then goto the download code page and click on the presentation for August 1999 - Interface Programming. That may have some answers for you. It was certainly an impressive presentation - with impressive code to go along with it.

Good luck,
John

John Pirkey
MCSD
www.ShallowWaterSystems.com

[Sigal Laniado]

I think that you need to replace the
"IView : IDispatch { ...}"
with "IView: IUnknown {...}"

I do this sort of thing, here is an example of one I implemented earlier. I think you need the library bit!

#############################
// std types
import "oaidl.idl";
import "ocidl.idl";

///////////////////////////////////////////////////////////////////////////////////
// IDoBobNotify Interface
import "IDoBobNotifyIF.IDL";

///////////////////////////////////////////////////////////////////////////////////
// IDoBob Interface
import "IDoBobIF.IDL";


///////////////////////////////////////////////////////////////////////////////////
// IJimmyInterface Interface
import "IJimmyInterfaceIF.IDL";


///////////////////////////////////////////////////////////////////////////////////
// Something for a type lib
[
uuid(E5AA4260-E873-11d3-9A92-0000E886120C),
version(1.0)
]
library DoBobDLL
{
importlib("StdOle32.Tlb");
importlib("StdOle2.Tlb");

interface IDoBob;
interface IDoBobNotify;
interface IJimmyInterface;
}

#############################