It has nothing to do with Outlook. It depends on your development platform.
For VBA you'd use a VBA UserForm, for .NET code you'd use a Windows Form,
for unmanaged code you'd use a form provided by your development
environment.
You'd show the form when you want, set a timer control to fire after an
interval you select, and when the timer fires you close your form.
"vonClausowitz" <vonclausowitz@gmail.com> wrote in message
news:699cd9da-07f9-4b48-984d-d323383b674c@f36g2000hsa.googlegroups.com...
<snip>
> How do you do this in Outlook?
>
> Marco