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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：
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);
}
}
}
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希望本文所述对大家的C#程序设计有所帮助。
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