diff --git a/include/nana/gui/programming_interface.hpp b/include/nana/gui/programming_interface.hpp
index cb795e5f..7d7e0538 100644
--- a/include/nana/gui/programming_interface.hpp
+++ b/include/nana/gui/programming_interface.hpp
@@ -45,6 +45,15 @@ namespace nana
 
 namespace API
 {
+#ifdef NANA_X11
+	//Some platform specific functions for X11
+	namespace x11
+	{
+		/// Returns the connection to the X server
+		const void* get_display();
+	}
+#endif
+
 	namespace detail
 	{
 		::nana::widget_geometrics* make_scheme(::nana::detail::scheme_factory_interface&&);
@@ -110,6 +119,7 @@ namespace API
 		void draw_shortkey_underline(paint::graphics&, const std::string& text, wchar_t shortkey, std::size_t shortkey_position, const point& text_pos, const color&);
 	}//end namespace dev
 
+
 	/// Returns the widget pointer of the specified window.
 	/*
 	 * @param window_handle A handle to a window owning the widget.
diff --git a/source/gui/detail/bedrock_posix.cpp b/source/gui/detail/bedrock_posix.cpp
index f72525fd..571b91bc 100644
--- a/source/gui/detail/bedrock_posix.cpp
+++ b/source/gui/detail/bedrock_posix.cpp
@@ -911,11 +911,18 @@ namespace detail
 			case Expose:
 				if(msgwnd->visible && (msgwnd->root_graph->empty() == false))
 				{
-					nana::detail::platform_scope_guard psg;
-					//Don't copy root_graph to the window directly, otherwise the edge nimbus effect will be missed.
-					::nana::rectangle update_area(xevent.xexpose.x, xevent.xexpose.y, xevent.xexpose.width, xevent.xexpose.height);
-					if (!update_area.empty())
-						msgwnd->drawer.map(reinterpret_cast<window>(msgwnd), true, &update_area);
+					nana::detail::platform_scope_guard lock;
+					if(msgwnd->is_draw_through())
+					{
+						msgwnd->other.attribute.root->draw_through();
+					}
+					else
+					{
+						//Don't copy root_graph to the window directly, otherwise the edge nimbus effect will be missed.
+						::nana::rectangle update_area(xevent.xexpose.x, xevent.xexpose.y, xevent.xexpose.width, xevent.xexpose.height);
+						if (!update_area.empty())
+							msgwnd->drawer.map(reinterpret_cast<window>(msgwnd), true, &update_area);
+					}
 				}
 				break;
 			case KeyPress:
diff --git a/source/gui/programming_interface.cpp b/source/gui/programming_interface.cpp
index 7ed9883f..da45698b 100644
--- a/source/gui/programming_interface.cpp
+++ b/source/gui/programming_interface.cpp
@@ -21,6 +21,9 @@
 #include <nana/gui/detail/events_operation.hpp>
 
 #include "../../source/detail/platform_abstraction.hpp"
+#ifdef NANA_X11
+#	include "../../source/detail/posix/platform_spec.hpp"
+#endif
 
 namespace nana
 {
@@ -52,6 +55,19 @@ namespace nana
 	}
 namespace API
 {
+#ifdef NANA_X11
+	//Some platform specific functions for X11
+	namespace x11
+	{
+		/// Returns the connection to the X server
+		const void* get_display()
+		{
+			auto & spec = nana::detail::platform_spec::instance();
+			return spec.open_display();			
+		}
+	}
+#endif
+
 	using basic_window = ::nana::detail::basic_window;
 	using interface_type = ::nana::detail::native_interface;
 
@@ -392,7 +408,6 @@ namespace API
 		}
 	}//end namespace dev
 
-
 	widget* get_widget(window wd)
 	{
 		internal_scope_guard lock;