【IT168技术文档】
1.首先引入System.Runtime.InteropServices
2.在类内部声明两个API函数,它们的位置和类的成员变量等同.using System.Runtime.InteropServices;
3.定义一个KeyModifiers的枚举,以便出现组合键[System.Runtime.InteropServices.DllImport("user32.dll")] //申明API函数 public static extern bool RegisterHotKey( IntPtr hWnd, // handle to window int id, // hot key identifier uint fsModifiers, // key-modifier options Keys vk // virtual-key code ); [System.Runtime.InteropServices.DllImport("user32.dll")] //申明API函数 public static extern bool UnregisterHotKey( IntPtr hWnd, // handle to window int id // hot key identifier );
4.在类的构造函数出注册系统热键public enum KeyModifiers { None = 0, Alt = 1, Control = 2, Shift = 4, Windows = 8 }
示例,下例注册了四个热键:
5.重写WndProc()方法,通过监视系统消息,来调用过程public MainForm() { InitializeComponent(); RegisterHotKey(Handle, 100, 2, Keys.Left); // 热键一:Control +光标左箭头 RegisterHotKey(Handle, 200, 2, Keys.Right); / /热键一:Control +光标右箭头 RegisterHotKey(Handle, 300, 2, Keys.Up); // 热键一:Control +光标上箭头 RegisterHotKey(Handle, 400, 2, Keys.Down); // 热键一:Control +光标下箭头 ....; }
示例:
protected override void WndProc(ref Message m)//监视Windows消息 { const int WM_HOTKEY = 0x0312; //如果m.Msg的值为0x0312那么表示用户按下了热键 switch (m.Msg) { case WM_HOTKEY: ProcessHotkey(m); //按下热键时调用ProcessHotkey()函数 break; } base.WndProc(ref m); //将系统消息传递自父类的WndProc }