Inherit Form

[Guest]

Hi all expert,

I need to create a baseform with MustOverride function, but i found that
once I had the parent form with mustoverride function, the child form are
not displayable in design view.

What had I had wrong?

Thanks alot.

 

[alantolan]

If you have a mustoverride function then the form becomes Mustinherit.

MustInherit forms cannot be instantiated but, the designer needs to
instantiate it to display the derived form.

Thus the problem.

hth,
Alan.

 

[Guest]

Hi alan,
sorry that, I still do not understand how I can make my child form
display able at design view...
can u briefly describe how? thanks a lot.

 

[The Grim Reaper]

He's saying that you can't.

_________________________________________
The Grim Reaper

 

[Phill. W]

I need to create a baseform with MustOverride function,

Actually, you don't, because currently, you can't.

i found that once I had the parent form with mustoverride function,
the child form are not displayable in design view.

because the Form's designer really *does* need to instantiate
your "abstract" form before it can use it.
(Don't know if this changes with VS'2005).

Remove the "MustOverride" keyword and add a very simple, if
annoying, implementation, something like

Protected Overridable Sub Beep()
If Not System.Diagnostics.Debugger.IsAttached Then
Throw New NotImplementedException()
End If
End Sub

People will get the idea *very* quickly ... ;-)

HTH,
Phill W.