C#实现基于加减按钮形式控制系统音量及静音的方法

本文实例讲述了C#实现基于加减按钮形式控制系统音量及静音的方法。分享给大家供大家参考。具体如下：

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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 VolumnSet

{

   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)

     {

       //加音量

       SendMessage( this .Handle, WM_APPCOMMAND, 0x30292, APPCOMMAND_VOLUME_UP * 0x10000);

     }

     private void button2_Click( object sender, EventArgs e)

     {

       //减音量

       SendMessage( this .Handle, WM_APPCOMMAND, 0x30292, APPCOMMAND_VOLUME_DOWN * 0x10000);

     }

     private void checkBox1_CheckedChanged( object sender, EventArgs e)

     {

       //静音

       SendMessage( this .Handle, WM_APPCOMMAND, 0x200eb0, APPCOMMAND_VOLUME_MUTE * 0x10000);

     }

   }

}

希望本文所述对大家的C#程序设计有所帮助。

dy("nrwz");

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