Index: boost/config/compiler/visualc.hpp
===================================================================
--- boost/config/compiler/visualc.hpp	(revision 42162)
+++ boost/config/compiler/visualc.hpp	(working copy)
@@ -168,8 +168,8 @@
 #error "Compiler not supported or configured - please reconfigure"
 #endif
 //
-// last known and checked version is 1400 (VC8):
-#if (_MSC_VER > 1400)
+// last known and checked version is 1500 (VC9):
+#if (_MSC_VER > 1500)
 #  if defined(BOOST_ASSERT_CONFIG)
 #     error "Unknown compiler version - please run the configure tests and report the results"
 #  else
Index: tools/build/v2/tools/msvc.jam
===================================================================
--- tools/build/v2/tools/msvc.jam	(revision 42162)
+++ tools/build/v2/tools/msvc.jam	(working copy)
@@ -231,6 +231,10 @@
         {
             # Even if version is not explicitly specified, try to detect the version
             # from the path.
+            if [ MATCH "(Microsoft Visual Studio 9.0)" : $(command) ]
+            {
+            version = 9.0 ;
+            } 
             if [ MATCH "(Microsoft Visual Studio 8)" : $(command) ]
             {
                 version = 8.0 ;
@@ -913,13 +917,14 @@
 
 .ProgramFiles = [ path.make [ common.get-program-files-dir ] ] ;
 
-.known-versions = 8.0 8.0express 7.1 7.1toolkit 7.0 6.0 ;
+.known-versions = 9.0 9.0express 8.0 8.0express 7.1 7.1toolkit 7.0 6.0 ; 
 
 # Version aliases
 .version-alias-6 = 6.0 ;
 .version-alias-6.5 = 6.0 ;
 .version-alias-7 = 7.0 ;
 .version-alias-8 = 8.0 ;
+.version-alias-9 = 9.0 ; 
  
 # Name of the registry key that contains Visual C++ installation path
 #   (relative to "HKEY_LOCAL_MACHINE\SOFTWARE\\Microsoft"
@@ -928,6 +933,8 @@
 .version-7.1-reg = "VisualStudio\\7.1\\Setup\\VC" ;
 .version-8.0-reg = "VisualStudio\\8.0\\Setup\\VC" ;
 .version-8.0express-reg = "VCExpress\\8.0\\Setup\\VC" ;
+.version-9.0-reg = "VisualStudio\\9.0\\Setup\\VC" ;
+.version-9.0express-reg = "VCExpress\\9.0\\Setup\\VC" ; 
 
 # Visual C++ Toolkit 2003 do not store its installation path in the registry.
 # The environment variable 'VCToolkitInstallDir' and the default installation