keyboard input

PacticeSolution/KeyboardInputSample/App.xaml

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+<Application x:Class="KeyboardInputSample.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:KeyboardInputSample"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+         
+    </Application.Resources>
+</Application>

PacticeSolution/KeyboardInputSample/App.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace KeyboardInputSample
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+}

PacticeSolution/KeyboardInputSample/AssemblyInfo.cs

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+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                                     //(used if a resource is not found in the page,
+                                     // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                              //(used if a resource is not found in the page,
+                                              // app, or any theme specific resource dictionaries)
+)]

PacticeSolution/KeyboardInputSample/KeyboardInputSample.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net6.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <UseWPF>true</UseWPF>
+  </PropertyGroup>
+
+</Project>

PacticeSolution/KeyboardInputSample/MainWindow.xaml

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+<Window x:Class="KeyboardInputSample.MainWindow"
+        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"
+        xmlns:local="clr-namespace:KeyboardInputSample"
+        mc:Ignorable="d"
+        Title="MainWindow" Height="300" Width="400">
+    <StackPanel>
+        <TextBox x:Name="tbxMain" Margin="20" 
+                   KeyDown="tbxMain_KeyDown"/>
+    </StackPanel>
+</Window>

PacticeSolution/KeyboardInputSample/MainWindow.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace KeyboardInputSample
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        public MainWindow()
+        {
+            InitializeComponent();
+        }
+
+        private void tbxMain_KeyDown(object sender, KeyEventArgs e)
+        {
+            string msg = "";
+            switch(e.Key)
+            {
+                case Key.O:
+                    msg = "O";
+                    break;
+                case Key.LeftCtrl:
+                    msg = "Ctrl";
+                    break;
+                case Key.LeftAlt:
+                    msg = "Alt";
+                    break;
+            }
+
+            // composite keys
+            if (Keyboard.IsKeyDown(Key.LeftAlt) && Keyboard.IsKeyDown(Key.Enter))
+                msg = "Alt + Enter";
+
+            if (!string.IsNullOrEmpty(msg))
+                MessageBox.Show(msg);
+        }
+    }
+}