Selectionner une ligne sur 2 Excel VBA

Option Explicit
Option Base 1
'colonnes concernées pour éviter de copier 16384 colonnes....
Const Col_deb As Byte = 1 'colonne A à adapter
Const Col_fin As Byte = 4 'colonne D à adapter
'---------------------------------------------
Sub copier_1sur2()
Dim Derlig As Long, T_in, T_out
Dim Lig As Integer, Col As Byte, Idx As Integer

'---------------initialisation
    Application.ScreenUpdating = False
    With Sheets(1)
        'mémorisation tableau initial
        Derlig = .Columns(Col_deb).Find(what:="*", searchdirection:=xlPrevious).Row
        T_in = .Range(.Cells(3, Col_deb), .Cells(Derlig, Col_fin))
    End With
    'préparation tableau 1/2
    ReDim T_out(Int(Derlig / 2) - 1, Col_fin - Col_deb + 1)
    
'---------------------traitement
    For Lig = 1 To UBound(T_in) Step 2
        Idx = Idx + 1
        For Col = Col_deb To Col_fin
            T_out(Idx, Col) = T_in(Lig, Col)
        Next
    Next
'---------------------restitution
    With Sheets(2)
        .Range("A2").Resize(UBound(T_out), Col_fin - Col_deb + 1) = T_out
        .Activate
    End With


End Sub