Using MFC ActiveX control in ASP

[Brett Robichaud]

I'm using VS.Net 2003 to create a very simple ActiveX control in MFC. The
control has no ui and just a few properties and methods.

What do I need to do to make it work in a classic ASP page? Currently any
time I try to set a property on my control {after calling 'Set obj =
Server.CreateObject(...)'} I get this error:

Error Type: (0x8000FFFF) Catastrophic failure

I can successfully use my control from a C# Winforms app.

What am I missing?

-Brett-

[Kathy]

> What do I need to do to make it work in a classic ASP page?

It needs a standard COM and/or an IDispatch interface. Does it have that?

- Kathy

[Brett Robichaud]

It does have an IDispatch interface. Here is the IDL:
// SimX.idl : type library source for ActiveX Control project.
// This file will be processed by the MIDL compiler tool to

// produce the type library (SimX.tlb) that will become a resource in

// SimX.ocx.

#include <olectl.h>

#include <idispids.h>

[ uuid(B879589D-FE5D-4602-AEA3-563546B8ACA0), version(1.0),

helpfile("SimX.hlp"),

helpstring("SimX ActiveX Control module"),

control ]

library SimXLib

{

importlib(STDOLE_TLB);

// Primary dispatch interface for CSimXCtrl

[ uuid(7FE57EC8-590F-416E-9842-829258C6A376),

helpstring("Dispatch interface for SimX Control")]

dispinterface _DSimX

{

properties:

[id(1), helpstring("property Prop1")] LONG Prop1;

[id(2), helpstring("property Prop2")] LONG Prop2;

methods:

};

// Event dispatch interface for CSimXCtrl

[ uuid(5D27723A-5B39-4E99-BAE5-04CD9B5225A4),

helpstring("Event interface for SimX Control") ]

dispinterface _DSimXEvents

{

properties:

// Event interface has no properties

methods:

};

// Class information for CSimXCtrl

[ uuid(F3BCCE44-7CFB-47CE-BCFF-88C676FD3B28),

helpstring("SimX Control"), control ]

coclass SimX

{

[default] dispinterface _DSimX;

[default, source] dispinterface _DSimXEvents;

};

};

This is from a plain-jane MFC activeX control. I must be doing something
simple wrong.

"Kathy" <i_luv_usenet@munged.yahoo.nospam.com> wrote in message
news:%23PSQy%23kpEHA.3592@TK2MSFTNGP09.phx.gbl...

> > What do I need to do to make it work in a classic ASP page?

>
> It needs a standard COM and/or an IDispatch interface. Does it have that?
>
> - Kathy
>
>

[Brett Robichaud]

I figured this out. Turns out to use a basic MFC ActiveX control in ASP you
need to override IsInvokeAllowed() and return TRUE.

Man I hate it when the answer is some subtle little thing like this. I just
blew 5 hrs trying to figure this out before I found the kb article Q146120.
Argh. I was just on the verge of re-writing it in ATL.

-Brett-

"Brett Robichaud" <brettrobichaud@nospam.yahoo.com> wrote in message
news:%23%23oOOElpEHA.1152@TK2MSFTNGP11.phx.gbl...

> It does have an IDispatch interface. Here is the IDL:
> // SimX.idl : type library source for ActiveX Control project.
> // This file will be processed by the MIDL compiler tool to
>
> // produce the type library (SimX.tlb) that will become a resource in
>
> // SimX.ocx.
>
> #include <olectl.h>
>
> #include <idispids.h>
>
> [ uuid(B879589D-FE5D-4602-AEA3-563546B8ACA0), version(1.0),
>
> helpfile("SimX.hlp"),
>
> helpstring("SimX ActiveX Control module"),
>
> control ]
>
> library SimXLib
>
> {
>
> importlib(STDOLE_TLB);
>
> // Primary dispatch interface for CSimXCtrl
>
> [ uuid(7FE57EC8-590F-416E-9842-829258C6A376),
>
> helpstring("Dispatch interface for SimX Control")]
>
> dispinterface _DSimX
>
> {
>
> properties:
>
> [id(1), helpstring("property Prop1")] LONG Prop1;
>
> [id(2), helpstring("property Prop2")] LONG Prop2;
>
> methods:
>
> };
>
> // Event dispatch interface for CSimXCtrl
>
> [ uuid(5D27723A-5B39-4E99-BAE5-04CD9B5225A4),
>
> helpstring("Event interface for SimX Control") ]
>
> dispinterface _DSimXEvents
>
> {
>
> properties:
>
> // Event interface has no properties
>
> methods:
>
> };
>
> // Class information for CSimXCtrl
>
> [ uuid(F3BCCE44-7CFB-47CE-BCFF-88C676FD3B28),
>
> helpstring("SimX Control"), control ]
>
> coclass SimX
>
> {
>
> [default] dispinterface _DSimX;
>
> [default, source] dispinterface _DSimXEvents;
>
> };
>
> };
>
> This is from a plain-jane MFC activeX control. I must be doing something
> simple wrong.
>
> "Kathy" <i_luv_usenet@munged.yahoo.nospam.com> wrote in message
> news:%23PSQy%23kpEHA.3592@TK2MSFTNGP09.phx.gbl...

> > > What do I need to do to make it work in a classic ASP page?

> >
> > It needs a standard COM and/or an IDispatch interface. Does it have

that?

> >
> > - Kathy
> >
> >

>
>