change volume of mp3 playing via wmplib in c#

Question

Is it somehow possible to change the volume of a mp3-file that is playing via wmplib? Changing the volume of the program itself would be ok as well.

Are there any solutions to do this?

score 7 · Answer 1 · edited Jul 01 '16 at 22:30

7

This is a simple way to do it.

Example:

WMPlib.WindowsMediaPlayer wmp = new WMPlib.WindowsMediaPlayer(); //Creates an instance of the WMP
wmp.url="URI to media source"; //Sets media source
wmp.settings.volume= 50;  //Volume can be 0-100 (inclusive)

Hope it helped you!

edited Jul 01 '16 at 22:30

answered Jul 21 '13 at 00:24

Abid Ali

101
1
5

1

ZAzakallah (Thanks). You made my day. – Muhammad Ashikuzzaman Nov 20 '14 at 03:56
Please can you tell me from which book or site tutorial you read this I also want to read the class library. – Muhammad Ashikuzzaman Nov 20 '14 at 03:58
This is simpler and better than the accepted answer which changes the volume not only on the application but to the whole system so other apps are also affected. +1 To set volume up you can do something like `wmp.settings.volume += 1;` – DGaleano Mar 17 '16 at 21:19

score 2 · Accepted Answer · edited May 23 '17 at 12:25

2

The idea is to send WM_APPCOMMAND message (also see this answer).

For WPF use WindowInteropHelper to get the Handle of the Window:

class MainWindow : Window
{
    ...

    private const int APPCOMMAND_VOLUME_MUTE = 0x80000;
    private const int WM_APPCOMMAND = 0x319;
    private const int APPCOMMAND_VOLUME_UP = 10 * 65536;
    private const int APPCOMMAND_VOLUME_DOWN = 9 * 65536;

    [DllImport("user32.dll")]
    public static extern IntPtr SendMessageW(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);

    private void VolumeUp()
    {
        // APPCOMMAND_VOLUME_UP or APPCOMMAND_VOLUME_DOWN
        var windowInteropHelper = new WindowInteropHelper(this);
        SendMessageW(windowInteropHelper.Handle, (IntPtr)WM_APPCOMMAND, windowInteropHelper.Handle, (IntPtr)APPCOMMAND_VOLUME_UP);
    }
}

For Windows Forms use Control.Handle Property:

class MainForm : Form
{
    ...

    private void VolumeUp()
    {
        SendMessageW(Handle, (IntPtr)WM_APPCOMMAND, Handle, (IntPtr)APPCOMMAND_VOLUME_UP);
    }
}

edited May 23 '17 at 12:25

Community

1
1

answered Jan 25 '13 at 18:45

Sergey Vyacheslavovich Brunov

17,291
7
48
81

Hi and thank you for the answer. I already saw that topic/answer but the code only gives me a bunch of errors. I´m using WindowsForms and i´m not sure if it´s because the WindowInteropHelper (or the namespace) might be limited to WPF. – f4bzen Jan 29 '13 at 00:21
I´m still getting a few errors on the SendMessageW-line, especially at (IntPtr)APPCOMMAND_VOLUME_UP);. The errors are for example: "'System.IntPtr' is a 'Type' but is used like a 'variable'", "Invalid expression term ')'", "')' expected", "';' expected" and "Only assignment, call, increment, decrement, and new object expressions can be used as a statement"... – f4bzen Jan 29 '13 at 19:46
@f4bzen, sorry! Corrected. – Sergey Vyacheslavovich Brunov Jan 29 '13 at 21:15
1

Ok, the code is now working for me, but I had to change the SendMessageW-line a little bit, since there was 1 argument missing in your version: SendMessageW(this.Handle, WM_APPCOMMAND, this.Handle, (IntPtr)APPCOMMAND_VOLUME_DOWN); So feel free to add this to your solution and thank you for helping me with this. – f4bzen Jan 29 '13 at 23:18

score 0 · Answer 3 · answered Oct 16 '14 at 19:00

0

This worked for me!

WMPLib.WindowsMediaPlayer wmsound= new WMPLib.WindowsMediaPlayer();

wmsound.URL = @"C:\Users\USER\sound.mp3";

//Volume 100%
finish_sound.settings.volume = 100;

answered Oct 16 '14 at 19:00

M1NT

386
1
4
13

change volume of mp3 playing via wmplib in c#

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