Some comments about your inquiry...
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A search turns up various definitions for MUI...
Magic User Interface (a commercial program)
Multi Language User Interface
Modeless User Interface
plus others
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Excel 2007 does not use a menubar or toolbars
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This is a VB/VBA group - not many C# responders here.
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Jim Cone
Portland, Oregon USA



"Torben Laursen"
wrote in message
I sell a Excel automated COM Add-in written in C# 3.5 for Excel and it works
just fine.
However if a user has MUI on his PC the COM does not work in Excel.
The COM adds a new menu to Excel and it does not show.
Does anyone know how to get around this problem?
Thanks Torben