The code in this project must be updated for use on 64-bit systems

Complete error message:

The code in this project must be updated for use on 64-bit systems. Please review and update Declare statements and then mark them with the PtrSafe attribute.

All Declare Statements must now include the PtrSafe keyword when running in 64-bit versions of Microsoft Office. The PtrSafe keyword indicates a Declare statement is safe to run in 64-bit versions of Microsoft Office.

Adding the PtrSafe keyword to a Declare statement only signifies the Declare statement explicitly targets 64-bits, all data types within the statement that need to store 64-bits (including return values and parameters) must still be modified to hold 64-bit quantities using eitherLongLong for 64-bit integrals orLongPtr for pointers and handles.