Q:WinForm 如何注冊熱鍵?
A:
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.DirectoryServices; using System.Runtime.InteropServices; namespace test ...{ public partial class Form1 : Form ...{ class HotKey ...{ //如果函數執行成功,返回值不為0。 //如果函數執行失敗,返回值為0。要得到擴展錯誤信息,調用GetLastError。 [DllImport( "user32.dll ", SetLastError = true)] public static extern bool RegisterHotKey( IntPtr hWnd, //要定義熱鍵的窗口的句柄 int id, //定義熱鍵ID(不能與其它ID重復) KeyModifiers fsModifiers, //標識熱鍵是否在按Alt、Ctrl、Shift、Windows等鍵時才會生效 Keys vk //定義熱鍵的內容 ); [DllImport( "user32.dll ", SetLastError = true)] public static extern bool UnregisterHotKey( IntPtr hWnd, //要取消熱鍵的窗口的句柄 int id //要取消熱鍵的ID ); //定義了輔助鍵的名稱(將數字轉變為字符以便於記憶,也可去除此枚舉而直接使用數值) [Flags()] public enum KeyModifiers ...{ None = 0, Alt = 1, Ctrl = 2, Shift = 4, WindowsKey = 8 } } public Form1() ...{ InitializeComponent(); HotKey.RegisterHotKey(this.Handle, 100, 0, Keys.F1); } protected override void WndProc(ref Message m) ...{ const int WM_HOTKEY = 0x0312; //按快捷鍵 switch (m.Msg) ...{ case WM_HOTKEY: switch (m.WParam.ToInt32()) ...{ case 100: MessageBox.Show( "Press F1 "); break; } break; } base.WndProc(ref m); } } }