private bool SysTrayCallback(uint message, SafeNotifyIconData nicData) { if (nicData.hWnd == IntPtr.Zero) { return(false); } NotifyIcon trayIcon = new NotifyIcon(this, nicData.hWnd); trayIcon.UID = nicData.uID; lock (_lockObject) { if ((NIM)message == NIM.NIM_ADD || (NIM)message == NIM.NIM_MODIFY) { try { bool exists = false; bool titleChanged = false; // hide icons while we are shell which require UWP support & we have a separate implementation for if (nicData.guidItem == new Guid(VOLUME_GUID) && ((EnvironmentHelper.IsAppRunningAsShell && EnvironmentHelper.IsWindows10OrBetter) || GroupPolicyHelper.HideScaVolume)) { return(false); } // hide icons per group policy if ((nicData.guidItem == new Guid(HEALTH_GUID) && GroupPolicyHelper.HideScaHealth) || (nicData.guidItem == new Guid(MEETNOW_GUID) && GroupPolicyHelper.HideScaMeetNow) || (nicData.guidItem == new Guid(NETWORK_GUID) && GroupPolicyHelper.HideScaNetwork) || (nicData.guidItem == new Guid(POWER_GUID) && GroupPolicyHelper.HideScaPower)) { return(false); } foreach (NotifyIcon ti in TrayIcons) { if (ti.Equals(nicData)) { exists = true; trayIcon = ti; break; } } if ((NIF.STATE & nicData.uFlags) != 0) { trayIcon.IsHidden = nicData.dwState == 1; } if ((NIF.TIP & nicData.uFlags) != 0 && !string.IsNullOrEmpty(nicData.szTip)) { trayIcon.Title = nicData.szTip; titleChanged = true; } if ((NIF.ICON & nicData.uFlags) != 0) { if (nicData.hIcon != IntPtr.Zero) { System.Windows.Media.ImageSource icon = IconImageConverter.GetImageFromHIcon(nicData.hIcon, false); if (icon != null) { trayIcon.Icon = icon; } else if (icon == null && trayIcon.Icon == null) { // Use default only if we don't have a valid icon already trayIcon.Icon = IconImageConverter.GetDefaultIcon(); } } else { trayIcon.Icon = null; } } trayIcon.HWnd = nicData.hWnd; trayIcon.UID = nicData.uID; if ((NIF.GUID & nicData.uFlags) != 0) { trayIcon.GUID = nicData.guidItem; } if (nicData.uVersion > 0 && nicData.uVersion <= 4) { trayIcon.Version = nicData.uVersion; } if ((NIF.MESSAGE & nicData.uFlags) != 0) { trayIcon.CallbackMessage = nicData.uCallbackMessage; } if (!exists) { // default placement to a menu bar-like rect trayIcon.Placement = defaultPlacement; // set properties used for pinning trayIcon.Path = ShellHelper.GetPathForWindowHandle(trayIcon.HWnd); trayIcon.SetPinValues(); if (trayIcon.Icon == null) { trayIcon.Icon = IconImageConverter.GetDefaultIcon(); } TrayIcons.Add(trayIcon); if ((NIF.INFO & nicData.uFlags) != 0) { handleBalloonData(nicData, trayIcon); } ShellLogger.Debug($"NotificationArea: Added: {trayIcon.Title} Path: {trayIcon.Path} Hidden: {trayIcon.IsHidden} GUID: {trayIcon.GUID} UID: {trayIcon.UID} Version: {trayIcon.Version}"); if ((NIM)message == NIM.NIM_MODIFY) { // return an error to the notifyicon as we received a modify for an icon we did not yet have return(false); } } else { if ((NIF.INFO & nicData.uFlags) != 0) { handleBalloonData(nicData, trayIcon); } if (titleChanged && trayIcon.GUID == default && !trayIcon.IsPinned) { // set properties used for pinning trayIcon.SetPinValues(); } ShellLogger.Debug($"NotificationArea: Modified: {trayIcon.Title}"); } } catch (Exception ex) { ShellLogger.Error("NotificationArea: Unable to modify the icon in the collection.", ex); } } else if ((NIM)message == NIM.NIM_DELETE) { try { foreach (var icon in TrayIcons) { if (icon.Equals(trayIcon)) { TrayIcons.Remove(trayIcon); ShellLogger.Debug($"NotificationArea: Removed: {icon.Title}"); return(true); } } return(false); } catch (Exception ex) { ShellLogger.Error("NotificationArea: Unable to remove the icon from the collection.", ex); } } else if ((NIM)message == NIM.NIM_SETVERSION) { if (nicData.uVersion > 4) { return(false); } foreach (NotifyIcon ti in TrayIcons) { if (ti.Equals(nicData)) { ti.Version = nicData.uVersion; ShellLogger.Debug($"NotificationArea: Modified version to {ti.Version} on: {ti.Title}"); break; } } } } return(true); }