[AccessD] using ADO to populate combos -was RE:Error3048Cannotopen any more databases

jwcolby jwcolby at colbyconsulting.com
Wed Mar 5 11:58:22 CST 2008


Hmm....

A form's module is just a class.  I have a class for every combo with the
combo passed in.  If I could place the callback inside of that class...
but...

I could swear that the combo had to have a public FUNCTION as the callback,
IOW as the combo loaded it tried to "call" the function and the function had
to be in a public module, not a class.  I must admit that I never tried to
do this inside of my class however. 


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 Gustav Brock
Sent: Wednesday, March 05, 2008 12:45 PM
To: accessd at databaseadvisors.com
Subject: Re: [AccessD] using ADO to populate combos -was
RE:Error3048Cannotopen any more databases

Hi John

I think you are right.
What I have done is to make the callback function private and copy it into
the module of the form - I've never had more than a couple of these for one
form. But I realize that this doesn't play well with your framework.

/gustav

>>> jwcolby at colbyconsulting.com 05-03-2008 17:28 >>>
Have you ever done this?  Inside of the call back function was a static
array where the data for that specific control was placed.  Thus each
callback was specific to the control passed in.  I tried doing this and
failed.

Do you have code demonstrating what you are thinking about?

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 Drew Wutka
Sent: Wednesday, March 05, 2008 11:12 AM
To: Access Developers discussion and problem solving
Subject: Re: [AccessD] using ADO to populate combos - was
RE:Error3048Cannotopen any more databases

That's not necessary, to write a function for each control.  One of the
arguments of that control is the control itself.

So you could create one function, in a module, that would be your 'global'
callback function.  What I would recommend would be to create a class that
would handle recordset objects, and in your callback function pull the
appropriate recordset from that class based on the control argument that is
passed to the callback function.

Drew

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of jwcolby
Sent: Wednesday, March 05, 2008 9:17 AM
To: 'Access Developers discussion and problem solving'
Subject: Re: [AccessD] using ADO to populate combos - was RE:
Error3048Cannotopen any more databases

Long ago I tried using call back functions and the only way I could figure
out to do it was write a callback for each object.  That just doesn't work
when you want to implement this easily and automatically system wide - five
hundred different combos.

John W. Colby
Colby Consulting
www.ColbyConsulting.com 



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