Thank you gmayor. Couple of points to clarify please.
1). It seems to trigger only once though. i.e. Document is opened, Print is selected and my message appears to warn the user that they should review the document and make sure the appropriate CheckBox is ticked. When the Print option is selected a successive time, the DocumentBeforePrint doesn't seem to trigger again.
2). Sorry but I didn't specify this earlier; if one or more of the CheckBox values is false, as well as displaying a message, I want the print request to cancel in order to force the user to review the document and make sure the requisite CheckBoxes are ticked.
Are both of these possible?
Regards Corin.