drive from MessageBox Class

angelboy · June 13th, 2007, 02:38 AM

hi expert
how can i create class with driving from MessageBox Class?
is it possible?
regards

planoie · June 13th, 2007, 09:09 AM

According to the MSDN documentation the MessageBox class is not sealed so you can extend it and do whatever you like with it.

-Peter

angelboy · June 13th, 2007, 02:12 PM

i create class
my code is

Code:

using System;
using System.Collections.Generic;
using System.Text;

namespace favoriteMsg
{
    public class Class1 : System.Windows.Forms.MessageBox
    {

    }
}

i recive th flowing error from compiler

Code:

The type 'System.Windows.Forms.MessageBox' has no constructors defined

then i change my code to this

Code:

using System;
using System.Collections.Generic;
using System.Text;

namespace favoriteMsg
{
    static class Class1 : System.Windows.Forms.MessageBox
    {

    }
}

but i recive another error

Code:

    Static class 'favoriteMsg.Class1' cannot derive from type 'System.Windows.Forms.MessageBox'. Static classes must derive from object.

what is the problem ?:(

planoie · June 13th, 2007, 02:29 PM

Apparently the MessageBox class has no public or protected constructors, therefore you can not create an instance of it. Thus you can not extend the class.

Similarly a class modified as 'static' is not instantiable and can therefore not extend any class other than System.Object.

What exactly are you trying to do? Can you create your own class and just call the MessageBox methods from it?

-Peter

angelboy · June 14th, 2007, 02:34 PM

no
i want to create my customize MessageBox form that able me to change the text of MessageBox Buttons

planoie · June 14th, 2007, 08:00 PM

Aha. Unfortunately, the messagebox class methods don't support the modification of the button text, just the ability to change which buttons and icons appear. You will have to create your own form to show as a messagebox.

-Peter