twetty1,
You will have to make your own using the InStr and Replace
(or Mid) functions (depending on your version of Access).
Something like this:
ptr = InStr(1, Me.SomeMemo, Me.FindThis)
While (ptr > 0)
Me.SomeMemo = Mid(Me.SomeMemo, 1, ptr - 1) & _
Me.ReplacementText & _
Mid(Me.SomeMemo, ptr + Len(Me.FindThis))
ptr = InStr(1, Me.SomeMemo, Me.FindThis)
Wend
Wayne