Add a helper process to Chrome Frame to allow for non-administrative installs...

chrome_frame/event_hooker.h

+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <windows.h>
+
+#ifndef CHROME_FRAME_EVENT_HOOKER_H_
+#define CHROME_FRAME_EVENT_HOOKER_H_
+
+class EventHooker {
+ public:
+  EventHooker();
+  ~EventHooker();
+
+  // Call this to install event hooks that will trigger on window creation
+  // and reparenting. Returns true if the hooks are successfully installed,
+  // false otherwise.
+  bool StartHook();
+
+  // Call this to remove the event hooks that are installed by StartHook().
+  void StopHook();
+
+  // The callback invoked in response to an event registered for in StartHook().
+  static VOID CALLBACK WindowCreationHookProc(HWINEVENTHOOK hook,
+                                              DWORD event,
+                                              HWND window,
+                                              LONG object_id,
+                                              LONG child_id,
+                                              DWORD event_tid,
+                                              DWORD event_time);
+
+ private:
+  HWINEVENTHOOK window_creation_hook_;
+};
+
+#endif  // CHROME_FRAME_EVENT_HOOKER_H_