In addition, VBA debug mode is disabled, so macros cannot be traced when an error occurs.
Software tools, such as our popular Unviewable+ VBA application, can protect macros, by making a VBA project unviewable in VBE.
If you have received the file from another person, the most likely scenario is that the workbook or add-in author locked macros to prevent users from viewing or editing his or hers VBA code.
