want to add this code in excel 2007

i want to open an specific worksheet and click on a button inside excel and run this code below......how do i do this?  




Sub Mail_ActiveSheet()
    Dim FileExtStr As String
    Dim FileFormatNum As Long
    Dim Sourcewb As Workbook
    Dim Destwb As Workbook
    Dim TempFilePath As String
    Dim TempFileName As String
    Dim OutApp As Object
    Dim OutMail As Object
 
    With Application
        .ScreenUpdating = False
        .EnableEvents = False
    End With
 
    Set Sourcewb = ActiveWorkbook
 
    'Copy the sheet to a new workbook
    ActiveSheet.Copy
    Set Destwb = ActiveWorkbook
    Destwb.Sheets(1).UsedRange.Value = Destwb.Sheets(1).UsedRange.Value
 
 
    'Save the new workbook/Mail it/Delete it
    TempFilePath = Environ$("temp") & "\"
    TempFileName = "Part of " & Sourcewb.Name & " " _
                 & Format(Now, "dd-mmm-yy h-mm-ss")
 
    Set OutApp = CreateObject("Outlook.Application")
    OutApp.Session.Logon
    Set OutMail = OutApp.CreateItem(0)
 
    With Destwb
        .SaveAs TempFilePath & TempFileName & ".xls"
        On Error Resume Next
        With OutMail
            .Attachments.Add Destwb.FullName
           .Display
        End With
        On Error GoTo 0
        .Close SaveChanges:=False
    End With
 
    'Delete the file you have send
    Kill TempFilePath & TempFileName & ".xls"
 
    Set OutMail = Nothing
    Set OutApp = Nothing
 
    With Application
        .ScreenUpdating = True
        .EnableEvents = True
    End With
End Sub