diff --git a/contrib/vstudio/readme.txt b/contrib/vstudio/readme.txt
index 904888b..59c8b8b 100644
--- a/contrib/vstudio/readme.txt
+++ b/contrib/vstudio/readme.txt
@@ -1,8 +1,8 @@
-Building instructions for the DLL versions of Zlib 1.2.4
+Building instructions for the DLL versions of Zlib 1.2.7
 ========================================================
 
 This directory contains projects that build zlib and minizip using
-Microsoft Visual C++ 9.0/10.0, and Visual C++ .
+Microsoft Visual C++ 9.0/10.0.
 
 You don't need to build these projects yourself. You can download the
 binaries from:
@@ -10,9 +10,6 @@ binaries from:
 
 More information can be found at this site.
 
-first compile assembly code by running
-bld_ml64.bat in contrib\masmx64
-bld_ml32.bat in contrib\masmx86
 
 
 
@@ -20,13 +17,16 @@ bld_ml32.bat in contrib\masmx86
 Build instructions for Visual Studio 2008 (32 bits or 64 bits)
 --------------------------------------------------------------
 - Uncompress current zlib, including all contrib/* files
-- Open contrib\vstudio\vc9\zlibvc.sln with Microsoft Visual C++ 2008.0
+- Compile assembly code (with Visual Studio Command Prompt) by running:
+   bld_ml64.bat (in contrib\masmx64)
+   bld_ml32.bat (in contrib\masmx86)
+- Open contrib\vstudio\vc9\zlibvc.sln with Microsoft Visual C++ 2008
 - Or run: vcbuild /rebuild contrib\vstudio\vc9\zlibvc.sln "Release|Win32"
 
 Build instructions for Visual Studio 2010 (32 bits or 64 bits)
 --------------------------------------------------------------
 - Uncompress current zlib, including all contrib/* files
-- Open contrib\vstudio\vc10\zlibvc.sln with Microsoft Visual C++ 2010.0
+- Open contrib\vstudio\vc10\zlibvc.sln with Microsoft Visual C++ 2010
 
 
 Important
diff --git a/contrib/vstudio/vc10/testzlibdll.vcxproj b/contrib/vstudio/vc10/testzlibdll.vcxproj
index 2d62815..bcb08ff 100644
--- a/contrib/vstudio/vc10/testzlibdll.vcxproj
+++ b/contrib/vstudio/vc10/testzlibdll.vcxproj
@@ -139,7 +139,7 @@
     </ClCompile>
     <Link>
       <AdditionalDependencies>x86\ZlibDllDebug\zlibwapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <OutputFile>$(OutDir)testzlib.exe</OutputFile>
+      <OutputFile>$(OutDir)testzlibdll.exe</OutputFile>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <ProgramDatabaseFile>$(OutDir)testzlib.pdb</ProgramDatabaseFile>
       <SubSystem>Console</SubSystem>
@@ -169,7 +169,7 @@
     </ClCompile>
     <Link>
       <AdditionalDependencies>x86\ZlibDllRelease\zlibwapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <OutputFile>$(OutDir)testzlib.exe</OutputFile>
+      <OutputFile>$(OutDir)testzlibdll.exe</OutputFile>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <SubSystem>Console</SubSystem>
       <OptimizeReferences>true</OptimizeReferences>
@@ -200,7 +200,7 @@
     </ClCompile>
     <Link>
       <AdditionalDependencies>x64\ZlibDllDebug\zlibwapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <OutputFile>$(OutDir)testzlib.exe</OutputFile>
+      <OutputFile>$(OutDir)testzlibdll.exe</OutputFile>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <ProgramDatabaseFile>$(OutDir)testzlib.pdb</ProgramDatabaseFile>
       <SubSystem>Console</SubSystem>
@@ -227,7 +227,7 @@
     </ClCompile>
     <Link>
       <AdditionalDependencies>ia64\ZlibDllDebug\zlibwapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <OutputFile>$(OutDir)testzlib.exe</OutputFile>
+      <OutputFile>$(OutDir)testzlibdll.exe</OutputFile>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <ProgramDatabaseFile>$(OutDir)testzlib.pdb</ProgramDatabaseFile>
       <SubSystem>Console</SubSystem>
@@ -257,7 +257,7 @@
     </ClCompile>
     <Link>
       <AdditionalDependencies>x64\ZlibDllRelease\zlibwapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <OutputFile>$(OutDir)testzlib.exe</OutputFile>
+      <OutputFile>$(OutDir)testzlibdll.exe</OutputFile>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <SubSystem>Console</SubSystem>
       <OptimizeReferences>true</OptimizeReferences>
@@ -288,7 +288,7 @@
     </ClCompile>
     <Link>
       <AdditionalDependencies>ia64\ZlibDllRelease\zlibwapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <OutputFile>$(OutDir)testzlib.exe</OutputFile>
+      <OutputFile>$(OutDir)testzlibdll.exe</OutputFile>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <SubSystem>Console</SubSystem>
       <OptimizeReferences>true</OptimizeReferences>
diff --git a/contrib/vstudio/vc10/zlib.rc b/contrib/vstudio/vc10/zlib.rc
index 9c71a6a..8eca4db 100644
--- a/contrib/vstudio/vc10/zlib.rc
+++ b/contrib/vstudio/vc10/zlib.rc
@@ -2,8 +2,8 @@
 
 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1.2.7,1
-  PRODUCTVERSION 1.2.7,1
+  FILEVERSION	 1.2.7,0
+  PRODUCTVERSION 1.2.7,0
   FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
   FILEFLAGS	0
   FILEOS	VOS_DOS_WINDOWS32
diff --git a/contrib/vstudio/vc10/zlibvc.def b/contrib/vstudio/vc10/zlibvc.def
index b4bb8f6..d39a1d2 100644
--- a/contrib/vstudio/vc10/zlibvc.def
+++ b/contrib/vstudio/vc10/zlibvc.def
@@ -1,7 +1,7 @@
 LIBRARY
 ; zlib data compression and ZIP file I/O library
 
-VERSION		1.24
+VERSION		1.2.7
 
 EXPORTS
         adler32                                  @1
@@ -132,5 +132,6 @@ EXPORTS
 
 ; zlib1 v1.2.6 added:
         gzgetc_                                 @161
+        gzflags                                 @162
         inflateResetKeep                        @163
-	deflateResetKeep			@164
+        deflateResetKeep                        @164
diff --git a/contrib/vstudio/vc10/zlibvc.vcxproj b/contrib/vstudio/vc10/zlibvc.vcxproj
index 9862398..9218fdc 100644
--- a/contrib/vstudio/vc10/zlibvc.vcxproj
+++ b/contrib/vstudio/vc10/zlibvc.vcxproj
@@ -180,6 +180,12 @@
     <CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Release|x64'">AllRules.ruleset</CodeAnalysisRuleSet>
     <CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Release|x64'" />
     <CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Release|x64'" />
+    <TargetName Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">zlibwapi</TargetName>
+    <TargetName Condition="'$(Configuration)|$(Platform)'=='ReleaseWithoutAsm|Win32'">zlibwapi</TargetName>
+    <TargetName Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">zlibwapi</TargetName>
+    <TargetName Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">zlibwapi</TargetName>
+    <TargetName Condition="'$(Configuration)|$(Platform)'=='ReleaseWithoutAsm|x64'">zlibwapi</TargetName>
+    <TargetName Condition="'$(Configuration)|$(Platform)'=='Release|x64'">zlibwapi</TargetName>
   </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <Midl>
@@ -227,6 +233,10 @@
       </DataExecutionPrevention>
       <ImportLibrary>$(OutDir)zlibwapi.lib</ImportLibrary>
     </Link>
+    <PreBuildEvent>
+      <Command>cd ..\..\masmx86
+bld_ml32.bat</Command>
+    </PreBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='ReleaseWithoutAsm|Win32'">
     <Midl>
@@ -324,6 +334,10 @@
       </DataExecutionPrevention>
       <ImportLibrary>$(OutDir)zlibwapi.lib</ImportLibrary>
     </Link>
+    <PreBuildEvent>
+      <Command>cd ..\..\masmx86
+bld_ml32.bat</Command>
+    </PreBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <Midl>
@@ -368,6 +382,10 @@
       <ImportLibrary>$(OutDir)zlibwapi.lib</ImportLibrary>
       <TargetMachine>MachineX64</TargetMachine>
     </Link>
+    <PreBuildEvent>
+      <Command>cd ..\..\contrib\masmx64
+bld_ml64.bat</Command>
+    </PreBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Itanium'">
     <Midl>
@@ -547,6 +565,10 @@
       <ImportLibrary>$(OutDir)zlibwapi.lib</ImportLibrary>
       <TargetMachine>MachineX64</TargetMachine>
     </Link>
+    <PreBuildEvent>
+      <Command>cd ..\..\masmx64
+bld_ml64.bat</Command>
+    </PreBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'">
     <Midl>
diff --git a/contrib/vstudio/vc9/zlib.rc b/contrib/vstudio/vc9/zlib.rc
index 9c71a6a..8eca4db 100644
--- a/contrib/vstudio/vc9/zlib.rc
+++ b/contrib/vstudio/vc9/zlib.rc
@@ -2,8 +2,8 @@
 
 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1.2.7,1
-  PRODUCTVERSION 1.2.7,1
+  FILEVERSION	 1.2.7,0
+  PRODUCTVERSION 1.2.7,0
   FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
   FILEFLAGS	0
   FILEOS	VOS_DOS_WINDOWS32
diff --git a/contrib/vstudio/vc9/zlibvc.def b/contrib/vstudio/vc9/zlibvc.def
index b4bb8f6..0c6d774 100644
--- a/contrib/vstudio/vc9/zlibvc.def
+++ b/contrib/vstudio/vc9/zlibvc.def
@@ -1,7 +1,7 @@
 LIBRARY
 ; zlib data compression and ZIP file I/O library
 
-VERSION		1.24
+VERSION		1.2.7
 
 EXPORTS
         adler32                                  @1
@@ -132,5 +132,6 @@ EXPORTS
 
 ; zlib1 v1.2.6 added:
         gzgetc_                                 @161
+        gzflags                                 @162
         inflateResetKeep                        @163
 	deflateResetKeep			@164