wpf中全局热键的实现- 李春良- 博客园企业库|免费b2b网站

在wpf中的全局键和form中有些差异，所以在这里记录一下，有用到得朋友可以试试！

首先注册APi

代码

1  [DllImport("user32.dll")]
2  public static extern bool RegisterHotKey(IntPtr hWnd, int id, uint control, System.Windows.Forms.Keys keys);
3  [DllImport("user32.dll")]
4  public static extern bool UnregisterHotKey(IntPtr hWnd, int id);

首先在这里事件里注册一个hotkey 并添加windows消息拦截，重点在于在wpf中必须使用

PresentationSource.FromVisual(this) as HwndSource;

来获取source。请注意。

代码

1    protected override void OnSourceInitialized(EventArgs e)
2         {
3             base.OnSourceInitialized(e);
4
5             IntPtr handle = new WindowInteropHelper(this).Handle;
6
7             //注册快捷键 0为失败
8             bool isHotKeySuccess = false;
9
10             isHotKeySuccess = RegisterHotKey(handle, MY_HOTKEYID, (UInt32)Hotkey.KeyFlags.Win, System.Windows.Forms.Keys.W);
11
12             //设置 windows消息拦截
13             //HwndSource.FromHwnd(handle).AddHook(new HwndSourceHook(WndProc));
14
15             HwndSource source = PresentationSource.FromVisual(this) as HwndSource;
16
17             source.AddHook(WndProc);
18
19             SetWindowLong(handle, -16, 0);
20         }

之后就是要处理你自己的方法就可以了，呵呵！！！

代码

/// <summary>
        /// Windows消息拦截
        /// </summary>
        /// <param name="hwnd"></param>
        /// <param name="msg"></param>
        /// <param name="wParam"></param>
        /// <param name="lParam"></param>
        /// <param name="handle"></param>
        /// <returns></returns>
        IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handle)
        {
            switch (msg)
            {
                case MY_HOTKEYID:
                    Executes.WindowShow(TabTypes.None);
                    break;
            }
            return IntPtr.Zero;
        }

搞定收工！！！！！！

window xp中测试过！！！！！！