Sub test()
Dim T(), TSpl$(), L&
T = Worksheets("Feuille1").[C7].CurrentRegion.Value
For L = 1 To UBound(T, 1)
TSpl = Split(T(L, 2), ".")
T(L, 1) = T(L, 1) + TimeValue(TSpl(0))
Next L
With Worksheets("Feuille1").[F7].Resize(UBound(T, 1))
.Value = T
.NumberFormat = "dd/mm/yyyy hh:mm:ss"
End With
End Sub