Question about inheritance

[Tom Rahav]

Hi,

I use VB .NET 2003 and I want to create a new UserControl that will function
as a "smart" combobox that handles few events automatically (such as
auto-complete, etc.) in addition to the regular combobox events.
I created a new class that inherits from: System.Windows. Forms.ComboBox.
I added the some code to the events in the new combobox (in the UserControl
project) and add the control to a win-form in a different project.
The problem is that the enevts I added don't run... When I tried to
understand why, I found that the SmartCombobox control in the win-form
project has its own events (as regular combobox), and what is being run is
the "local" events and not the code I added to the events in the new class.
What should I do in order to run the code in the new control automatically?

Thanks!
Tom.

[JasonS]

Re: Question about inheritance

On Thu, 24 Nov 2005 16:36:14 +0200, Tom Rahav wrote:
[color=blue]
> Hi,
>
> I use VB .NET 2003 and I want to create a new UserControl that will function
> as a "smart" combobox that handles few events automatically (such as
> auto-complete, etc.) in addition to the regular combobox events.
> I created a new class that inherits from: System.Windows. Forms.ComboBox.
> I added the some code to the events in the new combobox (in the UserControl
> project) and add the control to a win-form in a different project.
> The problem is that the enevts I added don't run... When I tried to
> understand why, I found that the SmartCombobox control in the win-form
> project has its own events (as regular combobox), and what is being run is
> the "local" events and not the code I added to the events in the new class.
> What should I do in order to run the code in the new control automatically?
>
> Thanks!
> Tom.[/color]

Don't try and capture the events in your subclass, but override the On...
methods.
For example:
Public Class Form1
Private Sub ComboBox1_Click (ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles ComboBox1.Click
MessageBox.Show ("Hi!")
End Sub
End Class

Public Class myCombo
Inherits Windows.Forms.C omboBox

Public Sub myCombo()
End Sub

Protected Overrides Sub OnClick(ByVal e As System.EventArg s)
MessageBox.Show ("Ho")
MyBase.OnClick( e)
End Sub

End Class

This will display a message box before calling your client app's click
event.

Cheers,
Jason