small change

include/nana/gui/filebox.hpp

@@ -47,8 +47,9 @@ namespace nana
 		/**
 		 * Changes the title. When #show()/operator()# are invoked, the dialog of filebox will be created with the specified title.
 		 * @param text Text of title
+		 * @return the reference of *this.
 		 */
-		void title( ::std::string text);  
+		filebox& title( ::std::string text);  
 
 		/// Sets a initial path
 		/**	

source/gui/filebox.cpp

@@ -1384,9 +1384,10 @@ namespace nana
 		impl_->owner = wd;
 	}
 
-	void filebox::title(std::string s)
+	filebox& filebox::title(std::string s)
 	{
 		impl_->title.swap(s);
+		return *this;
 	}
 
 	filebox& filebox::init_path(const path_type& p)