diff --git a/source/gui/detail/bedrock_windows.cpp b/source/gui/detail/bedrock_windows.cpp
index bd02a00d..baece504 100644
--- a/source/gui/detail/bedrock_windows.cpp
+++ b/source/gui/detail/bedrock_windows.cpp
@@ -1092,7 +1092,9 @@ namespace detail
 					//The focus window receives the message in Windows system, it should be redirected to the hovered window
                     ::POINT scr_pos{ pmdec.mouse.x, pmdec.mouse.y};  //Screen position
 					auto pointer_wd = ::WindowFromPoint(scr_pos);
-					if (pointer_wd == root_window)
+
+					//Ignore the message if the window is disabled.
+					if ((pointer_wd == root_window) && ::IsWindowEnabled(root_window))
 					{
 						::ScreenToClient(pointer_wd, &scr_pos);
 						auto scrolled_wd = wd_manager.find_window(reinterpret_cast<native_window_type>(pointer_wd), { scr_pos.x, scr_pos.y });
@@ -1124,7 +1126,7 @@ namespace detail
 							wd_manager.do_lazy_refresh(scrolled_wd, false);
 						}
 					}
-					else
+					else if (pointer_wd != root_window)
 					{
 						DWORD pid = 0;
 						::GetWindowThreadProcessId(pointer_wd, &pid);
diff --git a/source/gui/msgbox.cpp b/source/gui/msgbox.cpp
index 7263aa84..3c9d691b 100644
--- a/source/gui/msgbox.cpp
+++ b/source/gui/msgbox.cpp
@@ -1,7 +1,7 @@
 /*
  *	A Message Box Class
  *	Nana C++ Library(http://www.nanapro.org)
- *	Copyright(C) 2003-2018 Jinhao(cnjinhao@hotmail.com)
+ *	Copyright(C) 2003-2019 Jinhao(cnjinhao@hotmail.com)
  *
  *	Distributed under the Boost Software License, Version 1.0.
  *	(See accompanying file LICENSE_1_0.txt or copy at
@@ -453,7 +453,20 @@ namespace nana
         default:    break;
 		}
 
-		auto bt = ::MessageBoxW(reinterpret_cast<HWND>(API::root(wd_)), to_wstring(sstream_.str()).c_str(), to_wstring(title_).c_str(), type);
+		//Disables the owner window to prevent the owner window processing mouse wheel event
+		//when the message box is showing and scroll the wheel on the owner window.
+		auto native = reinterpret_cast<HWND>(API::root(wd_));
+		BOOL enabled = FALSE;
+		if (native)
+		{
+			enabled = ::IsWindowEnabled(native);
+			if (enabled)
+				::EnableWindow(native, FALSE);
+		}
+		auto bt = ::MessageBoxW(native, to_wstring(sstream_.str()).c_str(), to_wstring(title_).c_str(), type);
+
+		if (native && enabled)
+			::EnableWindow(native, TRUE);
 
 		switch(bt)
 		{