Alexander,I'm trying your suggestion but it seems like the Enabled event on a command is not fired when the parent toolbar is not visible.
As far as I know, there isn't any way to be notified when a toolbar is closed. What is it you're wanting to do when it's closed?
サインインしたメンバーは投稿、更新のフォローなどができます。初めてですか?無料アカウントを登録してください。
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.