Send multimedia commands

Question

Is there some way that I can send multimedia control commands like next song, pause, play, vol up, etc. to the operating system? Commands that are sent when pressing Fn + some mapped ..key. I am making a remote control for PC and sending those commands is essential.

Answer 1

You can use keybd_event to simulate keys presses, you have to simulate key down and then key up in order to recognize correctly

    [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);
    }`