C# 按钮控制windows音量

最新推荐文章于 2014-04-07 10:59:56 发布

转载最新推荐文章于 2014-04-07 10:59:56 发布 · 168 阅读

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原文链接：http://www.cnblogs.com/jx270/archive/2013/01/20/2869105.html

文章标签：

#runtime

本文介绍了一种使用C#编程语言控制Windows系统音量的方法。通过调用user32.dll中的SendMessage函数，可以实现音量增加、减少及静音切换的功能。代码中详细展示了如何发送APP_COMMAND消息来调整音量。

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C# 按钮控制windows音量

      控制系统音量
       
      using System;
      using System.Collections.Generic;
      using System.ComponentModel;
      using System.Data;
      using System.Drawing;
      using System.Linq;
      using System.Text;
      using System.Windows.Forms;
      using System.Runtime.InteropServices;//dll引用要用到的
       
      namespace WindowsFormsApplication2
      {
          public partial class Form1 : Form
          {
              [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
              static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, uint wParam, uint lParam);
       
              const uint WM_APPCOMMAND = 0x319;
              const uint APPCOMMAND_VOLUME_UP = 0x0a;
              const uint APPCOMMAND_VOLUME_DOWN = 0x09;
              const uint APPCOMMAND_VOLUME_MUTE = 0x08;
       
              public Form1()
              {
                  InitializeComponent();
              }
       
              private void button1_Click(object sender, EventArgs e)
              {//增加音量
                  SendMessage(this.Handle, WM_APPCOMMAND, 0x30292, APPCOMMAND_VOLUME_UP * 0x10000);
              }
       
              private void button2_Click(object sender, EventArgs e)
              {//减少音量
                  SendMessage(this.Handle, WM_APPCOMMAND, 0x30292, APPCOMMAND_VOLUME_DOWN * 0x10000);
              }
       
              private void button3_Click(object sender, EventArgs e)
              {//静音切换
                  SendMessage(this.Handle, WM_APPCOMMAND, 0x200eb0, APPCOMMAND_VOLUME_MUTE * 0x10000);
              }
       
              private void button1_MouseDown(object sender, MouseEventArgs e)
              {
                  
              }
       
          }
      }
     