How to show images in Windows balloon notifications?

Question

Is it possible to display custom image/icon in Windows balloon notification? The NotifyIcon control in .net framework supports balloon notifications but it only allows default icons like info, error etc.

If NotifyIcon does not support this, is there another API .net framework that allows notifications with custom images?

score 1 · Accepted Answer · answered Oct 05 '15 at 18:37

Found an answer. Windows API supports custom icons but the managed .net interface is quite bare bones. Win32 api Shell_NotifyIcon accepts a NOTIFYICONDATA structure. This structure has fields to set custom icon.

    public enum NotifyFlags
    {
        NIF_MESSAGE = 0x01, NIF_ICON = 0x02, NIF_TIP = 0x04, NIF_INFO = 0x10, NIF_STATE = 0x08,
        NIF_GUID = 0x20, NIF_SHOWTIP = 0x80, NIF_REALTIME = 0x40,
    }

    public enum NotifyCommand { NIM_ADD = 0x0, NIM_DELETE = 0x2, NIM_MODIFY = 0x1, NIM_SETVERSION = 0x4 }

    [StructLayout(LayoutKind.Sequential)]
    public struct NOTIFYICONDATA
    {
        public Int32 cbSize;
        public IntPtr hWnd;
        public Int32 uID;
        public NotifyFlags uFlags;
        public Int32 uCallbackMessage;
        public IntPtr hIcon;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
        public String szTip;
        public Int32 dwState;
        public Int32 dwStateMask;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
        public String szInfo;
        public Int32 uVersion;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)]
        public String szInfoTitle;
        public Int32 dwInfoFlags;
        public Guid guidItem; //> IE 6
        public IntPtr hBalloonIcon;
    }

    [DllImport("shell32.dll")]
    public static extern System.Int32 Shell_NotifyIcon(NotifyCommand cmd, ref NOTIFYICONDATA data);

    private void AddBalloon(string title, string message, Image image)
    {
        NOTIFYICONDATA data = new NOTIFYICONDATA();

        data.cbSize = Marshal.SizeOf(data);
        data.uID = 0x01;
        data.hWnd = Handle;
        data.dwInfoFlags = NIIF_USER;
        data.hIcon = Icon.Handle;
        data.hBalloonIcon = IntPtr.Zero;
        if (message.Image != null)
        {
            data.hBalloonIcon = ((Bitmap)image).GetHicon();
            data.dwInfoFlags |= NIIF_LARGE_ICON;
        }
        data.szInfo = message;
        data.szInfoTitle = title;

        data.uFlags = NotifyFlags.NIF_INFO | NotifyFlags.NIF_SHOWTIP | NotifyFlags.NIF_REALTIME;

        Shell_NotifyIcon(NotifyCommand.NIM_MODIFY, ref data) != 1);
    }

score 0 · Answer 2 · answered Apr 06 '15 at 12:03

0

Untested but you can change the icon, Hope this is helpful?

notificationIcon.Icon =  new Icon(Properties.Resources.ResourceManager.GetStream("<Image Location From root>"));

answered Apr 06 '15 at 12:03

joyhrs

16
1

1

Not helpful :( This sets the icon displayed in the taskbar - it does not influence balloon notification icons. – Gowtham Apr 06 '15 at 15:36

score 0 · Answer 3 · edited Aug 19 '18 at 06:15

I used joyhrs suggestion:

notificationIcon.Icon =  new Icon(Properties.Resources.ResourceManager.GetStream("<Image Location From root>"));

and as you said it not only shows the new icon in the balloon tip but it also changes the one in the system tray. So a bit of a simple hack was to add the handler

private void notifyIcon_BalloonTipShown(object sender, EventArgs e)

and change the system tray icon back to the original which leaves the icon in the balloon tip set to the new icon.

How to show images in Windows balloon notifications?

3 Answers3