C# 控制小鍵盤鎖 numlock

[DllImport("user32.dll")]
        static extern void keybd_event(byte bVk, byte bScan, int dwFlags, int dwExtraInfo);
        const int KEYEVENTF_EXTENDEDKEY = 0x1;
        const int KEYEVENTF_KEYUP = 0x2;
        public Form2()
        {
         
           keybd_event((byte)Keys.NumLock, 0, KEYEVENTF_EXTENDEDKEY, 0);//鎖上小鍵盤
           //  keybd_event((byte)Keys.NumLock, 0, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);//2條語句都可以實現，這2條語句都執行則解鎖
        
            InitializeComponent();
       
        }

摘自 Bychentufeiyang的專欄