VBA that opens Excel in new Window

Hi
I have a project were i have to make a macro and place in a workbook such that as soon as i open that excel file
1. excel workbook is opened in New Excel window
2. Ribbon is hidden for this new window.
So when user closes this excel window there is no problem with other workbook ribbon, as there are open in different window

i have tried with code stated below it hides the ribbon but new excel window is not open

Private sub Workbook_open()
Application.ExecuteExcel4Macro "Show.toolbar(""Ribbon"",False)"
End Sub

please help