Activex control

Re: Activex control

You can validate the value sent in the Let procedure
to make sure it's a valid setting. Is that what you mean?
If you want to return a result you need to use a function.

Private Name1 as string

Public Property Let Name(sName as string)
'-- you can validate whether this incoming value is a relevant string
'-- but you need a function to return a result. In this case, you'll
'-- assign incoming value to property only if first letter is "m".
'-- If they send "tree" the property will not be set but they won't
'-- know that unless you raise an error.

if (len(sName) > 0) then
If Ucase$(Left$(sN ame, 1)) = "M" then Name1 = sName
end if
End Property

Public Property Get Name() as String
Name = Name1
End Property
[color=blue]
>
> I'm just starting out in VB so please be patient.
>
> I am creating an activex control, in the class there is a single variable
> that is to be validated when set. Currently I am using the let/get[/color]
property[color=blue]
> to set and retrieve this value. Should I perform the validation within[/color]
the[color=blue]
> let property or within a function that then calls the let, I ask this as a
> let does not seem to be able to return a value.
>
> Thanks in advance.
>
> Rich
>
>[/color]

Re: Activex control

[color=blue]
> You can validate the value sent in the Let procedure
> to make sure it's a valid setting. Is that what you mean?
> If you want to return a result you need to use a function.[/color]

Ok thanks I think I need to use a function then.

Rich

Re: Activex control

There's no problem with that. The only reason to use
a Property is because it's clean and easy from the other
side. They can just use:

s = Ob.Name
or
Ob.Name = s

But you could also use a Boolean function:

Public Function Name(sName as String) as Boolean

and they'd then call it with:

Bool1 = Ob.Name(s)
If Bool1 = True then '-- s was valid.
[color=blue][color=green]
> > You can validate the value sent in the Let procedure
> > to make sure it's a valid setting. Is that what you mean?
> > If you want to return a result you need to use a function.[/color]
>
> Ok thanks I think I need to use a function then.
>
> Rich
>
>[/color]