How Can I Handle Native Windows Messages in WPF Without Overriding WndProc?

Handling WndProc messages in WPF: Exploring alternative techniques

In Windows Forms, overriding WndProc provides a direct message processing path. Converting this functionality to WPF requires a different approach.

System.Windows.Interop namespace

WPF introduces the System.Windows.Interop namespace, which contains the HwndSource class. This class allows interaction with native Windows messages.

Example implementation

Create a WPF application and use HwndSource to implement custom message processing:

<code class="language-csharp">using System;
using System.Windows;
using System.Windows.Interop;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        protected override void OnSourceInitialized(EventArgs e)
        {
            base.OnSourceInitialized(e);
            HwndSource source = PresentationSource.FromVisual(this) as HwndSource;
            source.AddHook(WndProc);
        }

        private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
        {
            // 处理消息...

            return IntPtr.Zero;
        }
    }
}</code>

Resource Acknowledgments

This example is inspired by Steve Rands' blog post: "Using a custom WndProc in a WPF application".

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