Support for locking/unlocking and closing other windows

FloatingStatusWindowLibrary/WindowManager.cs

@@ -0,0 +1,77 @@
+using Common.Native;
+using Common.Wpf.Windows;
+using System;
+using System.Collections.Generic;
+
+namespace FloatingStatusWindowLibrary
+{
+    public static class WindowManager
+    {
+        private const string WindowMessageSetLock = "FloatingStatusWindowLibrary_SetLock";
+        private const string WindowMessageClose = "FloatingStatusWindowLibrary_Close";
+
+        public static uint SetLockMessage { get; set; }
+        public static uint CloseMessage { get; set; }
+
+        static WindowManager()
+        {
+            SetLockMessage = Functions.User32.RegisterWindowMessage(WindowMessageSetLock);
+            CloseMessage = Functions.User32.RegisterWindowMessage(WindowMessageClose);
+        }
+
+        private static readonly object WindowLocker = new object();
+
+        private static List<WindowInformation> _windowList;
+        private static IntPtr _excludeHandle;
+
+        public static List<WindowInformation> GetWindowList()
+        {
+            lock (WindowLocker)
+            {
+                _windowList = new List<WindowInformation>();
+                _excludeHandle = IntPtr.Zero;
+
+                Functions.User32.EnumWindows(EnumWindowProc, IntPtr.Zero);
+
+                return _windowList;
+            }
+        }
+
+        public static List<WindowInformation> GetWindowList(IntPtr excludeHandle)
+        {
+            lock (WindowLocker)
+            {
+                _windowList = new List<WindowInformation>();
+                _excludeHandle = excludeHandle;
+
+                Functions.User32.EnumWindows(EnumWindowProc, IntPtr.Zero);
+
+                return _windowList;
+            }
+        }
+
+        private static bool EnumWindowProc(IntPtr hWnd, IntPtr lParam)
+        {
+            var windowText = Functions.Window.GetText(hWnd);
+
+            if (windowText == "FloatingStatusWindow" && hWnd != _excludeHandle)
+                _windowList.Add(new WindowInformation(hWnd));
+
+            return true;
+        }
+
+        public static void SetLockOnAll(bool locked)
+        {
+            var lockState = locked ? (IntPtr) 1 : (IntPtr) 0;
+
+            foreach (var w in GetWindowList())
+                Functions.User32.SendMessage(w.Handle, SetLockMessage, lockState, IntPtr.Zero);
+        }
+
+        public static void CloseAll()
+        {
+            foreach (var w in GetWindowList())
+                Functions.User32.SendMessage(w.Handle, CloseMessage, IntPtr.Zero, IntPtr.Zero);
+        }
+    }
+}