We are pleased to announce that latest Aspose.Cells for .NET version (you may get the latest version here) supports to digitally sign vba code project/macros with certificate, it also supports to check if digital signature for vba code is valid. Please use the following APIs:
See the documents with example code for your complete reference.
Digitally Sign a VBA Code Project with Certificate
Check if Digital Signature of VBA Code is Valid
Moreover, Aspose.Cells now supports to access, create and manipulate macros/vba code in the workbook although it does not support executing macros yet.
We also recommend you download our featured demos to test variety of different features.