The job of a development tool like Access is to shield you from the details of the operating system.
The properties we're discussing here (setting orientation, paper size, paper length, etc.), however, are almost "raw". That is, there's almost no protective layer between you and the operating system when you're trying to modify these properties.
Setting a value incorrectly or using an inappropriate value for one of the properties will likely cause Access to crash. The routines provided in the book are as painless as possible, but be aware of how little of a safety net there is when working this close to the surface.
