As in Microsoft Excel 5/95 VBA, if the user has the Break on All Errors setting checked, any error handling in your project is disabled. There is still no programmatic method of disabling this feature. However, since it must be set in the VBE interface in Microsoft Excel 97, users may be less likely to have it set. This setting does not affect error handling in add-ins. In other words, once it's saved as an add-in, you don't have to worry about how the user sets this option. But you still need to provide graceful error handling of your own.