Macro To Get Comments From All Worksheets

I am trying to find out if it is possible to do the following

I have an excel workbook with comments in a number of worksheets. I have created a macro so I can list the comments and the value of the cells with comments. The macro creates a new worksheet and list the comments and value this great but I can only get it to create the comments from the sheet which is active. Is there a way of getting all the comment and cell value from all the worksheet (the entire workbook)

this is the code for the macro

Sub shoppinglist()
Application. ScreenUpdating = False

Dim commrange As Range
Dim mycell As Range
Dim curwks As Worksheet
Dim newwks As Worksheet
Dim i As Long

Set curwks = ActiveSheet

On Error Resume Next
Set commrange = curwks.Cells _
.SpecialCells(xlCellTypeComments)
On Error Goto 0

If commrange Is Nothing Then
MsgBox "no comments found"
Exit Sub
End If ...