how do i create a macro to clear checkboxes and display a message.

From: Xavierskyrider (Xavierskyrider_at_discussions.microsoft.com)
Date: 02/25/05 

Date: Fri, 25 Feb 2005 12:13:03 -0800

Im doing an excel *** for work and need to program a macro so that say when
two checkboxes are checked at the same time it unchecks them and creates a
message box signifying an error. Maybe even have it play a sound too