How should i implement a delegate in VB6?

Joris van Lier · Joined: 04 Oct 2007 Posts: 12

I need to implement delegates in VB6, having some experience in C# and read
about AddressOf in VB6 but am not sure how to call the procedure at the
address.

The application should evaluate the state of certain variables and call a
corresponding method, the operators of the expression being evaluated and
the resulting method to be called should be configurable without touching
the code. Have read about CallByName, but need a solution that's as fast as
possible because app will be talking to a PLC

Archived from group: microsoft>public>vb>syntax

Bob O`Bob · Joined: 04 Oct 2007 Posts: 1456

Joris van Lier wrote:
> I need to implement delegates in VB6, having some experience in C# and read
> about AddressOf in VB6 but am not sure how to call the procedure at the
> address.
>
> The application should evaluate the state of certain variables and call a
> corresponding method, the operators of the expression being evaluated and
> the resulting method to be called should be configurable without touching
> the code. Have read about CallByName, but need a solution that's as fast as
> possible because app will be talking to a PLC

It would probably be best to explain what it is that you actually need
without expecting knowledge of other languages' terminology.

And maybe some specifics about what you have tried and why it was
found inadequate.

Bob
--

Tony Proctor · Joined: 04 Oct 2007 Posts: 1051

CallByName is the standard VB way, although the call is bordering on being
brain-dead (see
http://groups.google.ie/group/microsoft.public.vb.com/browse_frm/thread/0444c10d72f15cae/b3e094976a617518?&hl=en#b3e094976a617518).

Matt Curland's VB book explains better ways of doing it, although I use
InvokeHook and InvokeHookArray from TLBINF32.DLL (which I think he wrote
anyway)

Tony Proctor

"Bob O`Bob" wrote in message@TK2MSFTNGP02.phx.gbl...
> Joris van Lier wrote:
> > I need to implement delegates in VB6, having some experience in C# and
read
> > about AddressOf in VB6 but am not sure how to call the procedure at the
> > address.
> >
> > The application should evaluate the state of certain variables and call
a
> > corresponding method, the operators of the expression being evaluated
and
> > the resulting method to be called should be configurable without
touching
> > the code. Have read about CallByName, but need a solution that's as fast
as
> > possible because app will be talking to a PLC
>
>
> It would probably be best to explain what it is that you actually need
> without expecting knowledge of other languages' terminology.
>
> And maybe some specifics about what you have tried and why it was
> found inadequate.
>
>
>
> Bob
> --

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