I have an XLA that is to be distributed to multiple users. Each user will
use the UDFs in the Add-In in different spreadsheets. I have added the
following code to the "ThisWorkbook" object

Private WithEvents App As Application

Private Sub Workbook_Open()
Set App = Application
End Sub

Private Sub App_WorkbookOpen(ByVal Wb As Workbook)
' Do some stuff here
End Sub

For each XLS file I open in Excel, my App_WorkbookOpen code is called as
expected. The question I have is about when it fires compared to Excel
recalculating all cells referencing my UDFs.

Each time I open an Excel spreadsheet using my UDFs, Excel recalculates the
formulas and THEN raises the App_WorkbookOpen event. I want the cells to
automatically calculate on open of the file, however, I want to run some code
before it does this recalculation (namely cache some data so that the recalc
is faster).
I have even added: Private Sub App_SheetCalculate(ByVal Sh As Object)
but this fires after the auto recalculation on startup and after the
Workbook_open.

Does anyone have any suggestions?

Thanks,
Jeff