Pietro,
First of all, off on a tangent from your question, I would recommend
changing the name of your unbound control, as 'value' is a Reserved Word
(i.e. has a special meaning) in Access. Let's call it SearchValue instead.
You can use code, on the After Update event of the SearchValue textbox,
to modify the Record Source property of the form. Something like this:
Me.RecordSource = "SELECT * FROM YourExistingTable/Query WHERE Issue
Like "'*" & Me.SearchValue & "*'"
Or you could use code, again on the After Update event, to filter the
form's records, something like this:
Me.Filter = "Issue Like "'*" & Me.SearchValue & "*'"
Me.FilterOn = True

Signature
Steve Schapel, Microsoft Access MVP
> Hi,
> I've a continous fom called 'isues2',in the header of this form I've an
[quoted text clipped - 5 lines]
> display all the records that contain this word whether at the end or at the
> beginning or in the midst of the record.