diff --git a/vsprojects/buildtests_c.sln b/vsprojects/buildtests_c.sln
index d8ecdea..30f3bf5 100644
--- a/vsprojects/buildtests_c.sln
+++ b/vsprojects/buildtests_c.sln
@@ -114,6 +114,17 @@
         	lib = "True"
 	EndProjectSection
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "alarm_test", "vcxproj\test\alarm_test\alarm_test.vcxproj", "{AFD362D7-0E2A-E700-1F27-9D90F76166DF}"
+	ProjectSection(myProperties) = preProject
+        	lib = "False"
+	EndProjectSection
+	ProjectSection(ProjectDependencies) = postProject
+		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
+		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
+		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
+		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
+	EndProjectSection
+EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "algorithm_test", "vcxproj\test\algorithm_test\algorithm_test.vcxproj", "{216FDCB2-9D93-0D86-F0F1-12E16312A191}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
@@ -1499,6 +1510,22 @@
 		{80EA2691-C037-6DD3-D3AB-21510BF0E64B}.Release-DLL|Win32.Build.0 = Release|Win32
 		{80EA2691-C037-6DD3-D3AB-21510BF0E64B}.Release-DLL|x64.ActiveCfg = Release|x64
 		{80EA2691-C037-6DD3-D3AB-21510BF0E64B}.Release-DLL|x64.Build.0 = Release|x64
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Debug|Win32.ActiveCfg = Debug|Win32
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Debug|x64.ActiveCfg = Debug|x64
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Release|Win32.ActiveCfg = Release|Win32
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Release|x64.ActiveCfg = Release|x64
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Debug|Win32.Build.0 = Debug|Win32
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Debug|x64.Build.0 = Debug|x64
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Release|Win32.Build.0 = Release|Win32
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Release|x64.Build.0 = Release|x64
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Debug-DLL|x64.Build.0 = Debug|x64
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Release-DLL|Win32.Build.0 = Release|Win32
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Release-DLL|x64.ActiveCfg = Release|x64
+		{AFD362D7-0E2A-E700-1F27-9D90F76166DF}.Release-DLL|x64.Build.0 = Release|x64
 		{216FDCB2-9D93-0D86-F0F1-12E16312A191}.Debug|Win32.ActiveCfg = Debug|Win32
 		{216FDCB2-9D93-0D86-F0F1-12E16312A191}.Debug|x64.ActiveCfg = Debug|x64
 		{216FDCB2-9D93-0D86-F0F1-12E16312A191}.Release|Win32.ActiveCfg = Release|Win32
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index 438667a..448600c 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -606,6 +606,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\json\json_writer.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\alarm.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\api_trace.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\byte_buffer.c">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 90395ca..bae539c 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -298,6 +298,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\json\json_writer.c">
       <Filter>src\core\json</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\alarm.c">
+      <Filter>src\core\surface</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\api_trace.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index 014e67f..1cd5efd 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -542,6 +542,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\json\json_writer.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\alarm.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\api_trace.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\byte_buffer.c">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index 4f8a77d..1a61d8c 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -238,6 +238,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\json\json_writer.c">
       <Filter>src\core\json</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\alarm.c">
+      <Filter>src\core\surface</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\api_trace.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>