Question

How can I show a systray tooltip longer than 63 chars? NotifyIcon.Text has a 63 chars limit, but I’ve seen that VNC Server has a longer tooltip.

How can I do what VNC Server does?

Answer 1

Actually, it is a bug in the property setter for the Text property. The P/Invoke declaration for NOTIFYICONDATA inside Windows Forms uses the 128 char limit. You can hack around it with Reflection:

using System; using System.Windows.Forms; using System.Reflection;      public class Fixes {       public static void SetNotifyIconText(NotifyIcon ni, string text) {         if (text.Length >= 128) throw new ArgumentOutOfRangeException('Text limited to 127 characters');         Type t = typeof(NotifyIcon);         BindingFlags hidden = BindingFlags.NonPublic | BindingFlags.Instance;         t.GetField('text', hidden).SetValue(ni, text);         if ((bool)t.GetField('added', hidden).GetValue(ni))           t.GetMethod('UpdateIcon', hidden).Invoke(ni, new object[] { true });       }     }