c# - 发送多媒体指令

Question

有什么方法可以向操作系统发送多媒体控制命令，如下一首、暂停、播放、音量增大等？按下 Fn + 一些映射的 ..key 时发送的命令。我正在为 PC 制作 Remote ，发送这些命令是必不可少的。

Answer 1

你可以使用keybd_event来模拟按键，你必须先模拟按下然后再按下才能正确识别

    [DllImport("user32.dll", SetLastError = true)]
    public static extern void keybd_event(byte virtualKey, byte scanCode, uint flags, IntPtr extraInfo);
    public const int VK_MEDIA_NEXT_TRACK = 0xB0;
    public const int VK_MEDIA_PLAY_PAUSE = 0xB3;
    public const int VK_MEDIA_PREV_TRACK = 0xB1;
    public const int KEYEVENTF_EXTENDEDKEY = 0x0001; //Key down flag
    public const int KEYEVENTF_KEYUP = 0x0002; //Key up flag

    private void ButtonClick(object sender, EventArgs e)
        keybd_event(VK_MEDIA_PREV_TRACK, 0, KEYEVENTF_EXTENDEDKEY, IntPtr.Zero);
        keybd_event(VK_MEDIA_PREV_TRACK, 0, KEYEVENTF_KEYUP, IntPtr.Zero);
    }`