C#控制键盘按键的常用方法

本文实例讲述了c#控制键盘按键的常用方法。分享给大家供大家参考。具体实现方法如下：

using system;
using system.collections.generic;
using system.componentmodel;
using system.data;
using system.drawing;
using system.text;
using system.windows.forms;
using system.runtime.interopservices;
namespace sn设置键盘大小写
{
  public partial class form1 : form
  {
    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 form1()
    {
      initializecomponent();
    }
    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);
    }
  }
}

希望本文所述对大家的c#程序设计有所帮助。