Private Sub CommandButton1_Click()
Dim rechcell As Object, Msg As String
Sheets("Ref UO").Select
Set rechcell = Cells.Find(Me.TextBox4, , xlValues, xlWhole)
If rechcell Is Nothing Then Msg = Me.TextBox4 & " non présent."
If Me.TextBox4 = "" Then Msg = "TextBox4 non renseigné."
If Msg <> "" Then
MsgBox Msg, , "Information"
Else
rechcell.Activate
'ou activer la cellule à droite
'rechcell.Offset(, 1).Activate
End If
End Sub