I recently added the following code to a spreadsheet to add a right click
menu to run one of my forms/macros. The problem that I'm having is that it's
adding this to every spreadsheet and also adds each time so there are
multiple instances of the same right click menu item. I need some help
please!

Sub workbook_open()


Dim NewControl As CommandBarControl

Set NewControl = Application.CommandBars("Cell").Controls.Add
With NewControl
.Caption = "Add reservation"
.OnAction = "Module3.Cust_UF"
.BeginGroup = True
End With

End Sub


Any help would be appreciated!
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EW - Analyst