!free!: Vbadiff

ThisWorkbook (Class Module): [-] Line 12: Private Sub Workbook_Open() (Removed)

VbaDiff is the only tool designed specifically for the VBA binary structure.

: While it provides its own reporting, it can delegate detailed code-level comparisons to external text diff utilities such as WinMerge .

The Scenario: A hedge fund’s proprietary risk calculation model—contained entirely within a 50MB .xlsm file—started producing incorrect valuations. The developer who wrote the model had left the firm. The new developer had a backup from Tuesday (correct outputs) and the current file from Friday (incorrect outputs).