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：
usingSystem;
usingSystem.Collections.Generic;
usingSystem.ComponentModel;
usingSystem.Data;
usingSystem.Drawing;
usingSystem.Text;
usingSystem.Windows.Forms;
usingSystem.Runtime.InteropServices;
namespaceVolumnSet
{
publicpartialclassForm1:Form
{
[DllImport("user32.dll",CharSet=CharSet.Auto,SetLastError=true)]
staticexternIntPtrSendMessage(IntPtrhWnd,uintMsg,uintwParam,uintlParam);
constuintWM_APPCOMMAND=0x319;
constuintAPPCOMMAND_VOLUME_UP=0x0a;
constuintAPPCOMMAND_VOLUME_DOWN=0x09;
constuintAPPCOMMAND_VOLUME_MUTE=0x08;
publicForm1()
{
InitializeComponent();
}
privatevoidbutton1_Click(objectsender,EventArgse)
{
//加音量
SendMessage(this.Handle,WM_APPCOMMAND,0x30292,APPCOMMAND_VOLUME_UP*0x10000);
}
privatevoidbutton2_Click(objectsender,EventArgse)
{
//减音量
SendMessage(this.Handle,WM_APPCOMMAND,0x30292,APPCOMMAND_VOLUME_DOWN*0x10000);
}
privatevoidcheckBox1_CheckedChanged(objectsender,EventArgse)
{
//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。