A colleguage asked for a "Open Database" dialog. "Use @Prompt([ChooseDatabase])" was my answer.
A day later the colleguage asked "How do I catch the Cancel option?"
Hm. The return value of the dialog is an array with three elements. But if you hit Cancel the return value is... dada...
1
That's obvious, isn't it? If you cancel a dialog the return value is 1.