WPF 操作键盘

         #region 打开键盘的键
         const uint KEYEVENTF_EXTENDEDKEY = 0x1;
         const uint KEYEVENTF_KEYUP = 0x2;

         [DllImport("user32.dll")]
         static extern short GetKeyState(int nVirtKey);
         [DllImport("user32.dll")]
         static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, uint dwExtraInfo);

         public enum VirtualKeys : byte
         {
             VK_NUMLOCK = 0x90, //数字锁定键
             VK_SCROLL = 0x91,  //滚动锁定
             VK_CAPITAL = 0x14, //大小写锁定
             VK_A =
         }

         //获取key
         public static bool GetState(VirtualKeys Key)
         {
             return (GetKeyState((int)Key) == );
         }
         //设置key
         public static void SetState(VirtualKeys Key, bool State)
         {
             if (State != GetState(Key))
             {
                 keybd_event((byte)Key, 0x45, KEYEVENTF_EXTENDEDKEY | , );
                 keybd_event((byte)Key, 0x45, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, );
             }
         }
         #endregion

　　　　　　//打开大写键盘
调用:   SetState(VirtualKeys.VK_CAPITAL, true);