diff --git a/source/gui/detail/linux_X11/bedrock.cpp b/source/gui/detail/linux_X11/bedrock.cpp
index d6546f08..886f1493 100644
--- a/source/gui/detail/linux_X11/bedrock.cpp
+++ b/source/gui/detail/linux_X11/bedrock.cpp
@@ -719,12 +719,11 @@ namespace detail
 						if(kill_focus != new_focus)
 							brock.wd_manager.do_lazy_refresh(kill_focus, false);
 					}
+					auto retain = msgwnd->together.event_ptr;
 					msgwnd->root_widget->other.attribute.root->context.focus_changed = false;
-
 					context.event_window = msgwnd;
 
 					pressed_wd = nullptr;
-					//make_eventinfo(ei, msgwnd, message, xevent);
 					msgwnd->flags.action = mouse_action::pressed;
 					arg_mouse arg;
 					assign_arg(arg, msgwnd, ButtonPress, xevent);
@@ -774,6 +773,8 @@ namespace detail
 					msgwnd->flags.action = mouse_action::normal;
 					if(msgwnd->flags.enabled)
 					{
+						auto retain = msgwnd->together.event_ptr;
+
 						arg_mouse arg;
 						assign_arg(arg, msgwnd, message, xevent);
 
diff --git a/source/gui/detail/win32/bedrock.cpp b/source/gui/detail/win32/bedrock.cpp
index 7820227c..00968a6a 100644
--- a/source/gui/detail/win32/bedrock.cpp
+++ b/source/gui/detail/win32/bedrock.cpp
@@ -948,6 +948,8 @@ namespace detail
 					arg_mouse arg;
 					assign_arg(arg, msgwnd, message, pmdec);
 					msgwnd->flags.action = mouse_action::pressed;
+
+					auto retain = msgwnd->together.events_ptr;
 					if (brock.emit(event_code::mouse_down, msgwnd, arg, true, &context))
 					{
 						//If a root_window is created during the mouse_down event, Nana.GUI will ignore the mouse_up event.
@@ -982,6 +984,8 @@ namespace detail
 				msgwnd->flags.action = mouse_action::normal;
 				if(msgwnd->flags.enabled)
 				{
+					auto retain = msgwnd->together.events_ptr;
+
 					nana::arg_mouse arg;
 					assign_arg(arg, msgwnd, message, pmdec);
 
diff --git a/source/gui/widgets/listbox.cpp b/source/gui/widgets/listbox.cpp
index 6deb2b20..ef7a7130 100644
--- a/source/gui/widgets/listbox.cpp
+++ b/source/gui/widgets/listbox.cpp
@@ -8,8 +8,7 @@
  *	http://www.boost.org/LICENSE_1_0.txt)
  *
  *	@file: nana/gui/widgets/listbox.cpp
- *	@patchs:
- *		Jan 03 2012, unsigned to std::size_t conversion fail for x64, Hiroshi Seki
+ *	@contributors:	Hiroshi Seki, qPCR4vir
  */
 
 #include <nana/gui/widgets/listbox.hpp>
@@ -2614,7 +2613,6 @@ namespace nana
 					{
 						const auto & header = essence_->header.column(index);
                         auto it_bgcolor = bgcolor;
-                        //auto it_fgcolor = fgcolor;
 
 						if ((item.cells.size() > index) && (header.pixels > 5))
 						{