Bob said:
Is it possible to fire an event when the user clicks a custom toolbar
button?
Tool (and menu) bar items have their own interal click event
that calls the function you specify in your custom command
bar item's OnAction property.
The built-in command bar items call their own internal
procedure. You can change the OnAction property of the
built-in buttons, but it would be a bad thing because it
would change the items behavior across your entire
applcation (and maybe even all of Office). Instead create a
new command bar item and use your own code to do what you
want as well as what the real item does.