Demande d'aide macro

Const cotest As String = "A"
Const lideb As Long = 4

Public Sub OK()
Dim li As Long, lifin As Long
lifin = Range(cotest & Rows.Count).End(xlUp).Row
Application.ScreenUpdating = False
For li = lifin To lideb Step -1
  ' pour supprimer les lignes
  If Range(cotest & li).Value = "" Then Rows(li).Delete
  ' pour masquer les lignes
  ' If Range(cotest & li).Value = "" Then Rows(li).Hidden = True
Next li
End Sub

Public Sub supprimer_lignes()
Dim lig As Long
Const deb = 3  ' ligne début tableau
    For lig = ActiveSheet.UsedRange.Rows.Count To deb Step -1
        If Cells(lig, 1).Value = "" Then Rows(lig).Delete
    Next lig
End Sub