How to identify Excel 4.0 Macro?

We were trying to Sign an Excel Macro, but got an error that it contains Excel 4.0 Macros and hence it can't proceed to sign them. MSDN says it won't allow Excel 4.0 Macro's but we couldn't find ways to identify Excel 4.0 Macros.

How to identify if a Macro is Excel开发者_运维百科 4.0 or not?

If a macro is written in VBA using code editor, it is not an Excel 4.0 macro.

Excel 4.0 macro is a bunch of commands on a sheet.
You might have a formula somewhere... See an example.