[AccessD] Can't call methods I've added to a form?

>Now calling InitializeFromBuffer ... or any other public method I try to
add to a Form object ... from outside that Form's own class ... results in
an "Application-defined or object-defined error".

You don't say how you are calling the form's method.  You have to specify
the form object, then the method so...

Forms("MyForm").InitializeFromBuffer SomeParam

Alternatively:

Dim frm as form
	set frm=forms("MyForm")
	frm.InitializeFromBuffer SomeParam

Remember that a form's code is a class and you have to get a pointer to that
class in order to call a method of the class.

John W. Colby
Colby Consulting
www.ColbyConsulting.com 
-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Christopher Jeris
Sent: Monday, July 23, 2007 1:51 PM
To: accessd at databaseadvisors.com
Subject: [AccessD] Can't call methods I've added to a form?

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I'm trying to build a set of forms according to MVC principles, and I think
there's something fundamental I don't understand about Access form objects.
Everything here is unbound forms, in Access 2002 sp3.

I need to have "forms" that serve the same application role but present
different user interfaces according to context, so I build a Controller
object that creates different Form (view) objects depending on the context.
But the Controller needs to tell the view to update itself in certain ways,
so I have a method in the form's class like

Public Sub InitializeFromBuffer(buffer As DataModelObject)

and then the controller's process for opening up the form goes something
like

Set Me.activeForm = OpenFormByContext(intendedFormClass As String, _
  context As ContextInfo)
If Not Me.activeForm Is Nothing Then ' it worked
  Set Me.activeForm.Controller = Me
  Me.activeForm.InitializeFromBuffer theBuffer ' FAILURE End If

Now calling InitializeFromBuffer ... or any other public method I try to add
to a Form object ... from outside that Form's own class ... results in an
"Application-defined or object-defined error".

Is it really not possible to add methods to a Form that get called from
outside the Form -- or am I missing something obvious ?

I suppose, since adding _properties_ seems to work okay, one kludgy
workaround would be to give the Form a property that is its "view proxy
object", which is a user-defined class where all the methods I want to add
are located, and call methods through the view proxy object ... but I'd
rather say what I mean.

thanks, Chris Jeris
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