Simples repeat macro in Excel - vba

Question

I've googled this but couldn't find a clear answer.
I have a workbook that contains lots of sheets, each sheet contains purchase order info.
I want to copy the same cell range from each sheet and compile a long list of all of those ranges.
my codes is currently;
Sub WorksheetLoop()
Sheets("5040001253").Select
Range("A4:O23").Select
Selection.Copy
Sheets("PO_Combi").Select
lastRow = ActiveSheet.Cells(Rows.Count, "A").End(xlUp).Row
ActiveSheet.Range("A" & lastRow + 1).Select
Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
:=False, Transpose:=False
Application.CutCopyMode = False
End Sub
My question is: is there a simple command that allows to replace the sheet named 5040001253 with that will make this macro repeat on all sheets? If not, could someone tell me what to do to make it so?

Answer 1

Next code copies Range("A4:O23") from each sheet (except PO_Combi) to column A of sheet PO_Combi:
Sub WorksheetLoop()
Dim sh As Worksheet
Dim shCombi As Worksheet
Dim lastrow As Long
Set shCombi = ThisWorkbook.Worksheets("PO_Combi")
For Each sh In ThisWorkbook.Worksheets
With shCombi
If sh.Name <> .Name Then
lastrow = .Cells(.Rows.Count, "A").End(xlUp).Row
sh.Range("A4:O23").Copy
.Range("A" & lastrow + 1).PasteSpecial xlPasteValues
End If
End With
Next
Application.CutCopyMode = False
End Sub