The user interface add-in that supports the MtCalc add-in is MtCalcGui.xla. It contains only one important difference from MtBackgroundGui.xla, discussed above.
There is an additional command in modCommands, Reconnect(), which invokes the add-in function MtfReconnect(), via the VBA function ExeceuteExcel4Macro().
Public Sub Reconnect()
Application.ExecuteExcel4Macro "MtfReconnect()"
End Sub
See MtBackgroundGui.xla for a description of a standard GUI support add-in.