You're welcome

>You're absolutely right; I got it to work now. Thank you so much.
>
>>Sure, it can
>>
>>A class can only inherit from one class, but it can implement many interfaces
>>An interface is only a contact to implement some methods and properties
>>
>>I think the vb syntax would be
>>

>>Public Class txtBase
>>    Inherits textbox
>>   Implements IIOEnable 
>>
>>End Class
>>
>>

>>Have a look here http://msdn.microsoft.com/en-us/library/ms973803.aspx under 'Interface Inheritance'
>>
>>
>>

>>

>>>Sounds promising. Btu if my "txtBase" can "implement" the interface, they can't "inherit" from textbox, can they?
>>>
>>>
>>>>I would define an interface IIOEnable and have your subclassed controls implement that interface
>>>>
>>>>then - excuse the syntax - vb and c# mixture
>>>>

>>>>foreach ( Control ctrl in Me.Controls )
>>>>{
>>>>    IIOEnable ctrl1 = ctrl as IIOEnable ;
>>>>    if( ctrl1 != null )
>>>>         ctrl1.ioEnable(value);
>>>>
>>>>}
>>>>

>>>>
>>>>
>>>>

>>>>

>>>>>I have subclassed textboxes, panels and buttons. For each of those controls, I wrote an IOEnable method. I would like my (subclassed) form to execute these methods. I came up with something like this, which works, but am wondering if there is not a more generic approach to this, because now, each time I subclass a control I have to kind of "register" it here and in every container.
>>>>>

>>>>>For Each ctrl As Control In Me.Controls
>>>>>     If TypeOf ctrl Is txtBase Then
>>>>>         Dim ctrl1 As txtBase = ctrl
>>>>>         ctrl1.ioEnable(value)
>>>>>     End If
>>>>>     If TypeOf ctrl Is pnlBase Then
>>>>>         Dim ctrl1 As pnlBase = ctrl
>>>>>         ctrl1.ioEnable(value)
>>>>>     End If
>>>>>     If TypeOf ctrl Is btnBase Then
>>>>>         Dim ctrl1 As btnBase = ctrl
>>>>>         ctrl1.ioEnable(value)
>>>>>     End If
>>>>> Next
>>>>>

>>>>>
>>>>>In VFP this looked like this
>>>>>

>>>>>for each o in this.Controls
>>>>>        if !pemstatus(o,'IOEnable',5)
>>>>>            loop
>>>>>        endif
>>>>>        o.IOEnable()
>>>>>    endif
>>>>>endfor
>>>>>