You might want to look into a Factor design pattern...
http://www.dofactory.com/Patterns/Patterns.aspx#list
"Ruffin Bailey" <kaboom@atari.net> wrote in message
news:172e9d35.0402201004.588b7760@posting.google.c om...[color=blue]
> I want to declare an interface that forces the presence of a certain
> constructor (in this case, "Sub New(ByVal ds As DataSet)"). When I
> try, I get a
>
> 'Sub New' cannot be declared in an interface.
>
> ... error.
>
> Now I could create an object that implements the interface that
> includes the contructor and extend it, sure, but as I understand it,
> VB.NET isn't going to let me use multiple inheritence, and I need the
> interfaces to be implemented by Controls (Panels and UserControls,
> mostly). So creating an object with the constructor really isn't an
> option.
>
> Is there a way I can declare/require the existence of a certain
> constructor in an "interface-like fashion"?
>
> Thanks,
>
> Ruffin Bailey
>
> --
> Wasted bandwidth from a "professional" programmer
>
http://myfreakinname.blogspot.com[/color]
