diff --git a/include/boost/process/detail/handler.hpp b/include/boost/process/detail/handler.hpp
index 8afe1f19..2a351857 100644
--- a/include/boost/process/detail/handler.hpp
+++ b/include/boost/process/detail/handler.hpp
@@ -66,9 +66,6 @@ private:
 
 }
 
-constexpr boost::process::detail::make_handler_t<boost::process::detail::on_setup_>   on_setup;
-constexpr boost::process::detail::make_handler_t<boost::process::detail::on_error_>   on_error;
-constexpr boost::process::detail::make_handler_t<boost::process::detail::on_success_> on_success;
 
 
 }}
diff --git a/include/boost/process/detail/traits/cmd_or_exe.hpp b/include/boost/process/detail/traits/cmd_or_exe.hpp
index 00217480..cf230f70 100644
--- a/include/boost/process/detail/traits/cmd_or_exe.hpp
+++ b/include/boost/process/detail/traits/cmd_or_exe.hpp
@@ -48,6 +48,9 @@ template<> struct initializer_tag<std::vector<wchar_t *>> { typedef cmd_or_exe_t
 template<> struct initializer_tag<std::initializer_list<char    *>> { typedef cmd_or_exe_tag<char>     type;};
 template<> struct initializer_tag<std::initializer_list<wchar_t *>> { typedef cmd_or_exe_tag<wchar_t>  type;};
 
+template<> struct initializer_tag<std::initializer_list<const char    *>> { typedef cmd_or_exe_tag<char>     type;};
+template<> struct initializer_tag<std::initializer_list<const wchar_t *>> { typedef cmd_or_exe_tag<wchar_t>  type;};
+
 template<> struct initializer_tag<shell_>
 {
     typedef cmd_or_exe_tag<typename boost::filesystem::path::value_type> type;
diff --git a/include/boost/process/detail/windows/env_init.hpp b/include/boost/process/detail/windows/env_init.hpp
index 8b15f2a6..3c941004 100644
--- a/include/boost/process/detail/windows/env_init.hpp
+++ b/include/boost/process/detail/windows/env_init.hpp
@@ -25,8 +25,8 @@ struct env_init : public ::boost::process::detail::handler_base
     env_init(boost::process::basic_environment<Char> && env) : env(std::move(env)) {};
     env_init(const boost::process::basic_environment<Char> & env) : env(env) {};
 
-    ::boost::detail::winapi::DWORD_ creation_flag(char)    {return 0u;}
-    ::boost::detail::winapi::DWORD_ creation_flag(wchar_t)
+    constexpr static ::boost::detail::winapi::DWORD_ creation_flag(char)    {return 0u;}
+    constexpr static ::boost::detail::winapi::DWORD_ creation_flag(wchar_t)
     {
     	return ::boost::detail::winapi::CREATE_UNICODE_ENVIRONMENT_;
     }
@@ -42,7 +42,7 @@ struct env_init : public ::boost::process::detail::handler_base
         }
 
         exec.env = e;
-        exec.creation_flags |= creation_flags(Char());
+        exec.creation_flags |= creation_flag(Char());
     }
 
 };
diff --git a/include/boost/process/detail/windows/executor.hpp b/include/boost/process/detail/windows/executor.hpp
index f2de7c2a..286baa44 100644
--- a/include/boost/process/detail/windows/executor.hpp
+++ b/include/boost/process/detail/windows/executor.hpp
@@ -80,6 +80,12 @@ struct startup_info_impl
                 nullptr
     };
     startup_info_t & startup_info = startup_info_ex.StartupInfo;
+
+    void set_startup_info_ex()
+    {
+    	startup_info.cb = sizeof(startup_info_ex_t);
+    	creation_flags  = ::boost::detail::winapi::EXTENDED_STARTUPINFO_PRESENT_;
+    }
 };
 
 
diff --git a/include/boost/process/extend.hpp b/include/boost/process/extend.hpp
new file mode 100644
index 00000000..4ca28413
--- /dev/null
+++ b/include/boost/process/extend.hpp
@@ -0,0 +1,70 @@
+// Copyright (c) 2016 Klemens D. Morgenstern
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_PROCESS_EXTENSIONS_HPP_
+#define BOOST_PROCESS_EXTENSIONS_HPP_
+
+#include <boost/process/detail/handler.hpp>
+
+#if defined(BOOST_WINDOWS_API)
+#include <boost/process/detail/windows/executor.hpp>
+#include <boost/process/detail/windows/async_handler.hpp>
+#else
+#include <boost/process/detail/windows/executor.hpp>
+#include <boost/process/detail/windows/async_handler.hpp>
+#endif
+
+namespace boost {
+namespace process {
+namespace asio {
+class io_service;
+}
+namespace detail {
+template<typename Tuple>
+inline asio::io_service& get_io_service(const Tuple & tup);
+}
+
+
+///Namespace for extensions @attention This is experimental.
+namespace extend {
+
+#if defined(BOOST_WINDOWS_API)
+
+template<typename ...Args>
+using windows_executor = ::boost::process::detail::windows::executor<Args...>;
+template<typename ...Args>
+struct posix_executor;
+
+#else
+
+template<typename ...Args>
+using posix_executor = ::boost::process::detail::posix::executor<Args...>;
+template<typename ...Args>
+struct windows_executor;
+
+#endif
+
+using ::boost::process::detail::handler;
+using ::boost::process::detail::api::require_io_service;
+using ::boost::process::detail::api::async_handler;
+
+constexpr boost::process::detail::make_handler_t<boost::process::detail::on_setup_>   on_setup;
+constexpr boost::process::detail::make_handler_t<boost::process::detail::on_error_>   on_error;
+constexpr boost::process::detail::make_handler_t<boost::process::detail::on_success_> on_success;
+
+#if defined(BOOST_POSIX_API)
+///This handler is invoked if the fork fails.
+constexpr static ::boost::process::detail::make_handler_t<::boost::process::detail::posix::on_fork_error_  >   on_fork_error;
+///This handler is invoked if the fork succeeded.
+constexpr static ::boost::process::detail::make_handler_t<::boost::process::detail::posix::on_exec_setup_  >   on_exec_setup;
+///This handler is invoked if the exec call errored.
+constexpr static ::boost::process::detail::make_handler_t<::boost::process::detail::posix::on_exec_error_     >   on_exec_error;
+#endif
+
+}
+}
+}
+
+#endif
diff --git a/include/boost/process/posix.hpp b/include/boost/process/posix.hpp
index e43679c7..0c8f70a3 100644
--- a/include/boost/process/posix.hpp
+++ b/include/boost/process/posix.hpp
@@ -50,12 +50,7 @@ namespace posix {
  *
  */
 constexpr static ::boost::process::detail::posix::fd_ fd;
-///This handler is invoked if the fork fails.
-constexpr static ::boost::process::detail::make_handler_t<::boost::process::detail::posix::on_fork_error_  >   on_fork_error;
-///This handler is invoked if the fork succeeded.
-constexpr static ::boost::process::detail::make_handler_t<::boost::process::detail::posix::on_exec_setup_  >   on_exec_setup;
-///This handler is invoked if the exec call errored.
-constexpr static ::boost::process::detail::make_handler_t<::boost::process::detail::posix::on_exec_error_     >   on_exec_error;
+
 /** This property lets you modify the handling of `SIGCHLD` for this call. It will be reset afterwards.
 
 It can be set to default, by the expression `sig.dfl()`, set to ignore with `sig.ign()` or
diff --git a/test/Jamfile.jam b/test/Jamfile.jam
index a5302117..bc3c6715 100644
--- a/test/Jamfile.jam
+++ b/test/Jamfile.jam
@@ -14,6 +14,7 @@ import os ;
 if [ os.name ] = NT
 {
   lib ws2_32 ;
+  lib shell32 ;
 }
 
 project : requirements
@@ -25,7 +26,7 @@ project : requirements
   <os>NT,<toolset>gcc:<library>ws2_32
 ;
 
-searched-lib shell32 ;
+
 
 import testing ;
 
@@ -70,13 +71,11 @@ test-suite execution :
     [ run extensions.cpp system filesystem                    : : sparring_partner ]
     [ run env.cpp     program_options system filesystem       : : sparring_partner ]
     [ run group.cpp     system thread filesystem              : : sub_launch       ]
-    [ run posix_specific.cpp     system filesystem            : : sparring_partner : <build>no <target-os>linux:<build>yes   ]
     [ run run_exe.cpp filesystem                              : : sparring_partner ]
     [ run run_exe_path.cpp filesystem                         : : sparring_partner ]
     [ run search_path.cpp filesystem system                   : : : <target-os>windows:<source>shell32 ]
     [ run shell.cpp filesystem system                         : : sparring_partner ]
     [ run shell_path.cpp  filesystem system                   ]
-    [ run show_window.cpp filesystem system                   : : sparring_partner : <build>no <target-os>windows:<build>yes   ]
     [ run system_test1.cpp filesystem system                  : : sparring_partner ]
     [ run system_test2.cpp filesystem system                  : : sparring_partner ]
     [ run spawn.cpp filesystem system                         : : sparring_partner ]
@@ -86,4 +85,6 @@ test-suite execution :
 #    [ run vfork.cpp     system filesystem                     : : sparring_partner : <build>no <target-os>linux:<build>yes   ]
     [ run wait.cpp system filesystem                          : : sparring_partner ]
     [ compile-fail spawn_fail.cpp ]
+    [ run posix_specific.cpp     system filesystem            : : sparring_partner : <build>no <target-os>linux:<build>yes   ]
+    [ run windows_specific.cpp filesystem system                   : : sparring_partner : <build>no <target-os>windows:<build>yes   ]
    : <dependency>bare ;
diff --git a/test/error.cpp b/test/error.cpp
index 4ccda79a..ac7662a2 100644
--- a/test/error.cpp
+++ b/test/error.cpp
@@ -13,10 +13,12 @@
 
 #include <boost/process/error.hpp>
 #include <boost/process/child.hpp>
+#include <boost/process/extend.hpp>
 #include <boost/algorithm/string/predicate.hpp>
 #include <system_error>
 
 
+
 namespace bp = boost::process;
 
 struct err_set
@@ -46,7 +48,7 @@ BOOST_AUTO_TEST_CASE(setup_error)
     {
         es.ec.assign(42, std::system_category());
         std::error_code ec;
-        bp::child c(master_test_suite().argv[1], ec, bp::on_setup(es));
+        bp::child c(master_test_suite().argv[1], ec, bp::extend::on_setup(es));
 
         BOOST_CHECK(!c.running());
         BOOST_CHECK(ec);
@@ -57,7 +59,7 @@ BOOST_AUTO_TEST_CASE(setup_error)
     {
         es.ec.assign(24, std::system_category());
         es.msg = "MyMessage";
-        bp::child c(master_test_suite().argv[1], bp::on_setup(es));
+        bp::child c(master_test_suite().argv[1], bp::extend::on_setup(es));
 
     }
     catch( bp::process_error & se)
@@ -78,7 +80,7 @@ BOOST_AUTO_TEST_CASE(success_error)
     {
         es.ec.assign(22, std::system_category());
         std::error_code ec;
-        bp::child c(master_test_suite().argv[1], ec, bp::on_success(es));
+        bp::child c(master_test_suite().argv[1], ec, bp::extend::on_success(es));
 
 
         BOOST_CHECK(!c.running());
@@ -91,7 +93,7 @@ BOOST_AUTO_TEST_CASE(success_error)
     {
         es.ec.assign(23, std::system_category());
         es.msg = "MyMessage";
-        bp::child c(master_test_suite().argv[1], bp::on_success(es));
+        bp::child c(master_test_suite().argv[1], bp::extend::on_success(es));
 
 
     }
diff --git a/test/extensions.cpp b/test/extensions.cpp
index 95f4c9aa..1bb17742 100644
--- a/test/extensions.cpp
+++ b/test/extensions.cpp
@@ -15,6 +15,7 @@
 #include <boost/bind.hpp>
 #include <boost/ref.hpp>
 #include <boost/process/child.hpp>
+#include <boost/process/extend.hpp>
 
 
 namespace bp = boost::process;
@@ -54,8 +55,8 @@ BOOST_AUTO_TEST_CASE(extensions)
     bp::child c(
         "Wrong-Command",
         "test",
-        bp::on_setup=re,
-        bp::on_error=se,
+        bp::extend::on_setup=re,
+        bp::extend::on_error=se,
         bp::ignore_error
     );
     BOOST_CHECK(!se.ec);
diff --git a/test/show_window.cpp b/test/show_window.cpp
deleted file mode 100644
index fb682856..00000000
--- a/test/show_window.cpp
+++ /dev/null
@@ -1,40 +0,0 @@
-// Copyright (c) 2006, 2007 Julio M. Merino Vidal
-// Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
-// Copyright (c) 2009 Boris Schaeling
-// Copyright (c) 2010 Felipe Tanus, Boris Schaeling
-// Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
-//
-// Distributed under the Boost Software License, Version 1.0. (See accompanying
-// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-
-#define BOOST_TEST_MAIN
-#define BOOST_TEST_IGNORE_SIGCHLD
-#include <boost/test/included/unit_test.hpp>
-#include <boost/process.hpp>
-#include <boost/process/windows.hpp>
-#include <boost/system/error_code.hpp>
-
-#include <string>
-
-namespace bp = boost::process;
-
-BOOST_AUTO_TEST_CASE(show_window)
-{
-    using boost::unit_test::framework::master_test_suite;
-
-    bp::ipstream is;
-
-    std::error_code ec;
-    bp::child c(
-        master_test_suite().argv[1],
-        "test", "--windows-print-showwindow",
-        bp::windows::show_normal,
-        bp::std_out>is,
-        ec
-    );
-    BOOST_REQUIRE(!ec);
-
-    int i;
-    is >> i;
-    BOOST_CHECK_EQUAL(i, SW_SHOWNORMAL);
-}
diff --git a/test/windows_specific.cpp b/test/windows_specific.cpp
new file mode 100644
index 00000000..c31b6871
--- /dev/null
+++ b/test/windows_specific.cpp
@@ -0,0 +1,92 @@
+// Copyright (c) 2006, 2007 Julio M. Merino Vidal
+// Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
+// Copyright (c) 2009 Boris Schaeling
+// Copyright (c) 2010 Felipe Tanus, Boris Schaeling
+// Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#define BOOST_TEST_MAIN
+#define BOOST_TEST_IGNORE_SIGCHLD
+#include <boost/test/included/unit_test.hpp>
+#include <boost/process.hpp>
+#include <boost/process/windows.hpp>
+#include <boost/process/extend.hpp>
+#include <boost/system/error_code.hpp>
+
+#include <string>
+
+namespace bp = boost::process;
+
+BOOST_AUTO_TEST_CASE(show_window)
+{
+    using boost::unit_test::framework::master_test_suite;
+
+    bp::ipstream is;
+
+    std::error_code ec;
+    bp::child c(
+        master_test_suite().argv[1],
+        "test", "--windows-print-showwindow",
+        bp::windows::show_normal,
+        bp::std_out>is,
+        ec
+    );
+    BOOST_REQUIRE(!ec);
+
+    int i;
+    is >> i;
+    BOOST_CHECK_EQUAL(i, SW_SHOWNORMAL);
+}
+
+
+#if ( BOOST_USE_WINAPI_VERSION >= BOOST_WINAPI_VERSION_WIN6 )
+
+struct set_startup_info
+{
+	int &cnt;
+	template<typename T>
+    void operator()(T &e) const
+    {
+		cnt++;
+    	BOOST_CHECK_EQUAL(e.startup_info.cb, sizeof(::boost::detail::winapi::STARTUPINFOA_));
+    	e.set_startup_info_ex();
+    }
+
+};
+
+struct check_startup_info
+{
+    int &cnt;
+    template<typename T>
+    void operator()(T &e) const
+    {
+    	cnt++;
+    	BOOST_CHECK(e.creation_flags &  ::boost::detail::winapi::EXTENDED_STARTUPINFO_PRESENT_);
+    	BOOST_CHECK_EQUAL(e.startup_info.cb, sizeof(::boost::detail::winapi::STARTUPINFOEXA_));
+    }
+
+};
+
+BOOST_AUTO_TEST_CASE(startup_info_ex)
+{
+    using boost::unit_test::framework::master_test_suite;
+
+    bp::ipstream is;
+
+    int cnt = 0;
+
+    std::error_code ec;
+    bp::child c(
+        master_test_suite().argv[1],
+		bp::extend::on_setup(set_startup_info{cnt}),
+		bp::extend::on_success(check_startup_info{cnt}),
+        bp::std_out>is,
+        ec
+    );
+    BOOST_REQUIRE(!ec);
+    BOOST_CHECK_EQUAL(cnt, 2);
+}
+
+#endif