Bonjour
Ton code modifié
Sub MasquerLignesColonnesVides()
Dim derLi As Long
Application.ScreenUpdating = False
With ActiveSheet
derLi = .Range("A" & Rows.Count).End(xlUp).Row
Call GetRealLastCell
.Range(.Cells(derLi + 1, 1), .Cells(Rows.Count, 1)).EntireRow.Hidden = True a réctifier 'ICI TU PASSES EN FALSE
.Range(.Cells(1, derCol + 1), .Cells(1, Columns.Count)).EntireColumn.Hidden = True a réctifier 'ICI TU PASSES EN FALSE
End With
End Sub