Wrap the processing code in a loop
for each ws in thisworkbook.sheets
' do something on each worksheet
next
example
Sub DeleteEmptyRows()
Dim ws As Worksheet
Dim strSearch As String
Dim lRow As Long
strSearch = "ressort"
For Each ws In ThisWorkbook.Sheets
If (ws.Name <> "Sheet1") And (ws.Name <> "Sheet2") And (ws.Name <> "Sheet3") Then
With ws
lRow = .Range("A" & .Rows.Count).End(xlUp).Row
With .Range("A1:A" & lRow)
.AutoFilter Field:=1, Criteria1:="=*" & strSearch & "*"
.Offset(1, 0).SpecialCells(xlCellTypeVisible).EntireRow.Delete
End With
ws.Range("$A$1:$P$65536").AutoFilter Field:=1
End With
End If
Next
End Sub
so now if the sheet names are Sheet1 or Sheet2 or Sheet3 they will be skipped.