Index: basic_timed_mutex.hpp
===================================================================
--- basic_timed_mutex.hpp	(revision 41439)
+++ basic_timed_mutex.hpp	(working copy)
@@ -33,7 +33,15 @@
 
             void destroy()
             {
+#if defined(BOOST_MSVC) && !(defined(_M_IA64) || defined(_M_AMD64))
+// disable: warning C4312: 'type cast' : conversion from 'long' to 'void *' of greater size
+#pragma warning (push)
+#pragma warning (disable: 4312)
+#endif
                 void* const old_event=BOOST_INTERLOCKED_EXCHANGE_POINTER(&event,0);
+#if defined(BOOST_MSVC) && !(defined(_M_IA64) || defined(_M_AMD64))
+#pragma warning (pop)
+#endif
                 if(old_event)
                 {
                     win32::CloseHandle(old_event);
@@ -133,7 +141,16 @@
                 if(!current_event)
                 {
                     void* const new_event=win32::create_anonymous_event(win32::auto_reset_event,win32::event_initially_reset);
+#if defined(BOOST_MSVC) && !(defined(_M_IA64) || defined(_M_AMD64))
+// disable: warning C4311: 'type cast' : pointer truncation from 'void *const ' to 'long'
+// disable: warning C4312: 'type cast' : conversion from 'long' to 'void *' of greater size
+#pragma warning (push)
+#pragma warning (disable: 4311 4312)
+#endif
                     void* const old_event=BOOST_INTERLOCKED_COMPARE_EXCHANGE_POINTER(&event,new_event,0);
+#if defined(BOOST_MSVC) && !(defined(_M_IA64) || defined(_M_AMD64))
+#pragma warning (pop)
+#endif
                     if(old_event!=0)
                     {
                         win32::CloseHandle(new_event);