Your requirement is still unclear what tool you want to trigger on Decativate event?If you want to do something when your tool is not active tool use Neils tip.If you want to do something when some other tool, that you don't implement in your extension you can just test if the tool is active and after that if is inactive. In ArcMap in ITool Enabled is invoked at least once a second.Other way goes very low into hooks, but this can be uneficient way of solving your issue.
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.