如何在我的应用程序中调用函数的Windows中创建键盘快捷键？
如何创建使用键盘快捷键执行操作的应用程序（应用程序必须是不可见的）。 例如，当用户按Ctrl + Alt + W时显示MessageBox。
一种解决方案是使用互操作并使用Win32 RegisterHotKey API。 这是一个快速而肮脏的例子，我刚刚放在一起所以它没有经过充分测试，我不确定没有未发现的副作用，但它应该工作。
首先是一个简单的HotKeyManager它负责基本的互操作，提供一个隐藏的窗口来处理本机Windows消息（WM_HOTKEY），它被转换成.NET事件HotKeyPressed
using System; using System.Windows.Forms; using System.Runtime.InteropServices; public class HotKeyManager { public static event EventHandler HotKeyPressed; public static int RegisterHotKey(Keys key, KeyModifiers modifiers) { int id = System.Threading.Interlocked.Increment(ref _id); RegisterHotKey(_wnd.Handle, id, (uint)modifiers, (uint)key); return id; } public static bool UnregisterHotKey(int id) { return UnregisterHotKey(_wnd.Handle, id); } protected static void OnHotKeyPressed(HotKeyEventArgs e) { if (HotKeyManager.HotKeyPressed != null) { HotKeyManager.HotKeyPressed(null, e); } } private static MessageWindow _wnd = new MessageWindow(); private class MessageWindow : Form { protected override void WndProc(ref Message m) { if (m.Msg == WM_HOTKEY) { HotKeyEventArgs e = new HotKeyEventArgs(m.LParam); HotKeyManager.OnHotKeyPressed(e); } base.WndProc(ref m); } private const int WM_HOTKEY = 0x312; } [DllImport("user32")] private static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk); [DllImport("user32")] private static extern bool UnregisterHotKey(IntPtr hWnd, int id); private static int _id = 0; } public class HotKeyEventArgs : EventArgs { public readonly Keys Key; public readonly KeyModifiers Modifiers; public HotKeyEventArgs(Keys key, KeyModifiers modifiers) { this.Key = key; this.Modifiers = modifiers; } public HotKeyEventArgs(IntPtr hotKeyParam) { uint param = (uint)hotKeyParam.ToInt64(); Key = (Keys)((param & 0xffff0000) >> 16); Modifiers = (KeyModifiers)(param & 0x0000ffff); } } [Flags] public enum KeyModifiers { Alt = 1, Control = 2, Shift = 4, Windows = 8, NoRepeat = 0x4000 }
下面显示了一个简单的Windows窗体应用程序，它将隐藏主窗体并响应热键事件。 我没有处理应用程序的关闭和取消注册热键，你可以处理。
using System; using System.Windows.Forms; namespace HotKeyManager { public partial class Form1 : Form { public Form1() { InitializeComponent(); HotKeyManager.RegisterHotKey(Keys.A, KeyModifiers.Alt); HotKeyManager.HotKeyPressed += new EventHandler(HotKeyManager_HotKeyPressed); } void HotKeyManager_HotKeyPressed(object sender, HotKeyEventArgs e) { MessageBox.Show("Hello"); } protected override void SetVisibleCore(bool value) { // Quick and dirty to keep the main window invisible base.SetVisibleCore(false); } } }
将此添加到表单的KeyPress事件：
if(e.KeyCode == (char)Keys.W && e.Modifiers == Keys.Control && e.Modifiers = Keys.Alt) { MessageBox.Show("I think this is a homework and that you should study instead of asking for an already cooked up answer on programming websites","Cheater"); }