假設今天我想要讓使用者Hot key(如Alt) trigger程式做事情的時候 我們可以編寫UI的xaml 加入 PreviewKeyDown 事件的handler 並實作他 Step 1. Add event handler < Window xmlns ="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns : x ="http://schemas.microsoft.com/winfx/2006/xaml" xmlns : d ="http://schemas.microsoft.com/expression/blend/2008" xmlns : mc ="http://schemas.openxmlformats.org/markup-compatibility/2006" mc : Ignorable ="d" xmlns : conv ="clr-namespace:Solution.Converter" x : Class ="Solution.MainWindow" WindowState ="Maximized" WindowStyle ="None" SnapsToDevicePixels ="True" d : DesignWidth ="800" d : DesignHeight ="600" Loaded ="Window_Loaded" PreviewKeyDown ="Window_PreviewKeyDown" Step 2. Implement event handle