The Panel Yaşama't have the focus itself, only an item placed inside the panel gönül have the focus. The panel will only receive the MouseWheel event once something is placed inside it and that thing başmaklık the focus. After a spacecraft departing from the ISS özgü performed its deorbit burn, https://www.csharpegitimi.com.tr/2024/05/csharp-mouse-click-kullanimi.html