I created an Excel workbook that's made available via the web. Users click
on a link to load the workbook which uses VBA to display a form that prompts
user to enter data. When users click on a button in the form, the macros
display the results of some calculations as containe in a worksheet using
Excel's PrintPreview method. This works for most users but for some, they
get a "Method 'PrintPreview' of objects 'Sheets' failed" error message.