1、 窗体热键
首先要设置主窗体KeyPreview为true,可直接在属性中进行设置,
或者在窗体加载中设置: this.KeyPreview = true;
然后添加窗体KeyDown事件,如下:
private void FrmMain_KeyDown(object sender, KeyEventArgs e)
{ if (e.Alt && e.Shift && e.Control && e.KeyCode == Keys.S) { MessageBox.Show("我按了Control +Shift +Alt +S"); } }
2、全局热键设置
定义API函数 》 注册热键 》 卸载热键
我这里定义了AppHotKey类,全部代码如下:
public class AppHotKey { [DllImport("kernel32.dll")] public static extern uint GetLastError(); //如果函数执行成功,返回值不为0。 //如果函数执行失败,返回值为0。要得到扩展错误信息,调用GetLastError。 [DllImport("user32.dll", SetLastError = true)] public static extern bool RegisterHotKey( IntPtr hWnd, //要定义热键的窗口的句柄 int id, //定义热键ID(不能与其它ID重复) KeyModifiers fsModifiers, //标识热键是否在按Alt、Ctrl、Shift、Windows等键时才会生效 Keys vk //定义热键的内容 ); [DllImport("user32.dll", SetLastError = true)] public static extern bool UnregisterHotKey( IntPtr hWnd, //要取消热键的窗口的句柄 int id //要取消热键的ID ); //定义了辅助键的名称(将数字转变为字符以便于记忆,也可去除此枚举而直接使用数值) [Flags()] public enum KeyModifiers { None = 0, Alt = 1, Ctrl = 2, Shift = 4, WindowsKey = 8 } /// <summary> /// 注册热键 /// </summary> /// <param name="hwnd">窗口句柄</param> /// <param name="hotKey_id">热键ID</param> /// <param name="keyModifiers">组合键</param> /// <param name="key">热键</param> public static void RegKey(IntPtr hwnd, int hotKey_id, KeyModifiers keyModifiers, Keys key) { try { if (!RegisterHotKey(hwnd, hotKey_id, keyModifiers, key)) { if (Marshal.GetLastWin32Error() == 1409) { MessageBox.Show("热键被占用 !"); } else { MessageBox.Show("注册热键失败!"); } } } catch (Exception) { } } /// <summary> /// 注销热键 /// </summary> /// <param name="hwnd">窗口句柄</param> /// <param name="hotKey_id">热键ID</param> public static void UnRegKey(IntPtr hwnd, int hotKey_id) { //注销Id号为hotKey_id的热键设定 UnregisterHotKey(hwnd, hotKey_id); } }
重写窗体的WndProc函数,在窗口创建的时候注册热键,窗口销毁时销毁热键,代码如下:
private const int WM_HOTKEY = 0x312; //窗口消息-热键 private const int WM_CREATE = 0x1; //窗口消息-创建 private const int WM_DESTROY = 0x2; //窗口消息-销毁 private const int Space = 0x3572; //热键ID protected override void WndProc(ref Message m) { base.WndProc(ref m); switch (m.Msg) { case WM_HOTKEY: //窗口消息-热键ID switch (m.WParam.ToInt32()) { case Space: //热键ID MessageBox.Show("我按了Control +Shift +Alt +S"); break; default: break; } break; case WM_CREATE: //窗口消息-创建 AppHotKey.RegKey(Handle, Space, AppHotKey.KeyModifiers.Ctrl | AppHotKey.KeyModifiers.Shift | AppHotKey.KeyModifiers.Alt, Keys.S); break; case WM_DESTROY: //窗口消息-销毁 AppHotKey.UnRegKey(Handle, Space); //销毁热键 break; default: break; } }