C#调节系统音量与静音代码

最新推荐文章于 2024-12-25 19:49:50 发布

原创最新推荐文章于 2024-12-25 19:49:50 发布 · 6.9k 阅读

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CC 4.0 BY-SA版权

文章标签：

#c# #byte #up #user #class

本文介绍了一个使用C#编写的简单音量控制类，通过调用Windows API实现音量增大、减小及静音的功能。该类使用了keybd_event函数来模拟键盘按键事件，实现了对系统音量的调整。

using System;
using System.Runtime.InteropServices;

namespace AutoSound
{
    public class SimpleSoundControl
    {
        private const byte VK_VOLUME_MUTE = 0xAD;
        private const byte VK_VOLUME_DOWN = 0xAE;
        private const byte VK_VOLUME_UP = 0xAF;
        private const UInt32 KEYEVENTF_EXTENDEDKEY = 0x0001;
        private const UInt32 KEYEVENTF_KEYUP = 0x0002;

[DllImport("user32.dll")]
static extern void keybd_event(byte bVk, byte bScan, UInt32 dwFlags, UInt32 dwExtraInfo);

[DllImport("user32.dll")]
static extern Byte MapVirtualKey(UInt32 uCode, UInt32 uMapType);

        public static void VolumeUp()
        {
            keybd_event(VK_VOLUME_UP, MapVirtualKey(VK_VOLUME_UP, 0), KEYEVENTF_EXTENDEDKEY, 0);
            keybd_event(VK_VOLUME_UP, MapVirtualKey(VK_VOLUME_UP, 0), KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
        }

        public static void VolumeDown()
        {
            keybd_event(VK_VOLUME_DOWN, MapVirtualKey(VK_VOLUME_DOWN, 0), KEYEVENTF_EXTENDEDKEY, 0);
            keybd_event(VK_VOLUME_DOWN, MapVirtualKey(VK_VOLUME_DOWN, 0), KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
        }

        public static void Mute()
        {
            keybd_event(VK_VOLUME_MUTE, MapVirtualKey(VK_VOLUME_MUTE, 0), KEYEVENTF_EXTENDEDKEY, 0);
            keybd_event(VK_VOLUME_MUTE, MapVirtualKey(VK_VOLUME_MUTE, 0), KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
        }
    }
}