Copying shhets with formula in Excel

HI,

If you protect the workbook structure, users cannot insert, delete, rename, move, copy, hide or unhide worksheets anymore.

On the Review tab, click Protect Workbook, make sure Structure is ticked and OK

Regards

Its not about protection - this sheet  is a rough working sheet that gets deleted before  xls is sent to client - but don't save xls, Sometimes we save the xls and then need to restore sheet....

with this code in the ThisWorkbook module you could force a SaveAs

Private Sub Workbook_BeforeSave(ByVal SaveAsUI As Boolean, Cancel As Boolean)

    Dim strFileName As String

    Cancel = True 'Cancel the save operation

    strFileName = Application.GetSaveAsFilename(Replace(ThisWorkbook.Name, ".xls", "_ClientVersion.xls"))

    If strFileName <> Me.FullName And strFileName <> "False" Then
        Application.EnableEvents = False
            ThisWorkbook.SaveAs strFileName 
        Application.EnableEvents = True
    End If

End Sub

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Pls don't  confuse the solution: I'm after this:
"Say, I've a sheet with formula in Excel which occasionally gets deleted. How can I copy the sheet back from a back up copy and ensure that the formula pertain to the new Excel spread sheet? There is the option of copy sheet, from 1 spread sheet to another, but will this bring the formula in and have them pertain to the new spread sheet? I am looking for an efficient way of carrying out this operation.
Thanks
Shaun