Alert and filtering based on conditional formatting VBA

Hi all,

Looking for some help with VBA. I want to build a macro that runs when the workbook is initialized that will filter a sheet based on a due date (where the duedate<= Today()+90). What the Macro should do is filter the worksheet so that only the records with due dates in this range will be displayed and possibly throw in a message box "Projects due in the next 3 months".

Any help with this would be greatly appreciated!

Thanks,

Wolfman