zoukankan      html  css  js  c++  java
  • C#控制键盘大小写切换

            #region 键盘大小写控制
            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 = 62
            }
    
            public static bool GetState(VirtualKeys Key)
            {
                return (GetKeyState((int)Key) == 1);
            }
            public static void SetState(VirtualKeys Key, bool State)
            {
                if (State != GetState(Key))
                {
                    keybd_event((byte)Key, 0x45, KEYEVENTF_EXTENDEDKEY | 0, 0);
                    keybd_event((byte)Key, 0x45, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
                }
            }
    
            //开启键盘大写
            private void btnOpenCAPITAL_Click(object sender, EventArgs e)
            {
                SetState(VirtualKeys.VK_CAPITAL, true);
            }
    
            //关闭键盘大写
            private void btnCloseCAPITAL_Click(object sender, EventArgs e)
            {
                SetState(VirtualKeys.VK_CAPITAL, false);
            }
    
            //开启键盘滚动锁定
            private void btnOpenScroll_Click(object sender, EventArgs e)
            {
                SetState(VirtualKeys.VK_SCROLL, true);
            }
    
            //关闭键盘滚动锁定
            private void btnCloseScroll_Click(object sender, EventArgs e)
            {
                SetState(VirtualKeys.VK_SCROLL, false);
            }
    
            //开启键盘数字锁定键
            private void btnOpenNum_Click(object sender, EventArgs e)
            {
                SetState(VirtualKeys.VK_NUMLOCK, true);
            }
    
            //关闭键盘数字锁定键
            private void btnCloseNum_Click(object sender, EventArgs e)
            {
                SetState(VirtualKeys.VK_NUMLOCK, false);
            }
            #endregion 键盘大小写控制
  • 相关阅读:
    生成全局id的方式
    如何使得搜索的信息更准确?
    水平分区
    大表如何优化?
    MySQL_fetch_array和MySQL_fetch_object的区别是什么?
    BLOB和TEXT区别
    如何在Unix和MySQL时间戳之间进行转换?
    用ActionSupport实现验证
    服务器端验证--验证框架验证required.
    自定义类型转换器converter
  • 原文地址:https://www.cnblogs.com/swtool/p/7007427.html
Copyright © 2011-2022 走看看