diff --git a/libs/freetdm/mod_openzap/mod_openzap.c b/libs/freetdm/mod_openzap/mod_openzap.c
index ffdab55b1f..27ca737669 100644
--- a/libs/freetdm/mod_openzap/mod_openzap.c
+++ b/libs/freetdm/mod_openzap/mod_openzap.c
@@ -338,7 +338,6 @@ static switch_status_t channel_waitfor_write(switch_core_session_t *session, int
 static switch_status_t channel_send_dtmf(switch_core_session_t *session, char *dtmf)
 {
 	private_t *tech_pvt = NULL;
-	char *digit;
 
 	tech_pvt = switch_core_session_get_private(session);
 	assert(tech_pvt != NULL);
@@ -352,9 +351,9 @@ static switch_status_t channel_read_frame(switch_core_session_t *session, switch
 {
 	switch_channel_t *channel = NULL;
 	private_t *tech_pvt = NULL;
-	zap_size_t len;
+	uint32_t len;
 	zap_wait_flag_t wflags = ZAP_READ;
-	uint8_t dtmf[128] = "";
+	char dtmf[128] = "";
 	zap_status_t status;
 
 	channel = switch_core_session_get_channel(session);
@@ -509,8 +508,6 @@ static switch_call_cause_t channel_outgoing_channel(switch_core_session_t *sessi
 		private_t *tech_pvt;
 		switch_channel_t *channel;
 		switch_caller_profile_t *caller_profile;
-		unsigned int req = 0, cap = 0;
-		unsigned short samprate = 0;
 
 		switch_core_session_add_stream(*new_session, NULL);
 		if ((tech_pvt = (private_t *) switch_core_session_alloc(*new_session, sizeof(private_t))) != 0) {
@@ -637,7 +634,7 @@ static void zap_logger(char *file, const char *func, int line, int level, char *
 static switch_status_t load_config(void)
 {
 	char *cf = "openzap.conf";
-	switch_xml_t cfg, xml, settings, param, spans, span;
+	switch_xml_t cfg, xml, settings, param, spans, myspan;
 
 	memset(&globals, 0, sizeof(globals));
 	switch_mutex_init(&globals.mutex, SWITCH_MUTEX_NESTED, module_pool);
@@ -658,9 +655,9 @@ static switch_status_t load_config(void)
 	}
 
 	if ((spans = switch_xml_child(cfg, "analog_spans"))) {
-		for (span = switch_xml_child(spans, "span"); span; span = span->next) {
-			char *mod = (char *) switch_xml_attr_soft(span, "module");
-			char *id = (char *) switch_xml_attr_soft(span, "id");
+		for (myspan = switch_xml_child(spans, "span"); myspan; myspan = myspan->next) {
+			char *mod = (char *) switch_xml_attr_soft(myspan, "module");
+			char *id = (char *) switch_xml_attr_soft(myspan, "id");
 			char *context = "default";
 			char *dialplan = "XML";
 			char *tonegroup = NULL;
@@ -669,7 +666,7 @@ static switch_status_t load_config(void)
 			uint32_t span_id = 0, to = 0, max = 0;
 			zap_span_t *span = NULL;
 
-			for (param = switch_xml_child(span, "param"); param; param = param->next) {
+			for (param = switch_xml_child(myspan, "param"); param; param = param->next) {
 				char *var = (char *) switch_xml_attr_soft(param, "name");
 				char *val = (char *) switch_xml_attr_soft(param, "value");
 
diff --git a/libs/freetdm/mod_openzap/mod_openzap.vcproj b/libs/freetdm/mod_openzap/mod_openzap.vcproj
new file mode 100644
index 0000000000..a1ebe71e9a
--- /dev/null
+++ b/libs/freetdm/mod_openzap/mod_openzap.vcproj
@@ -0,0 +1,201 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioProject
+	ProjectType="Visual C++"
+	Version="8.00"
+	Name="mod_openzap"
+	ProjectGUID="{FE3540C5-3303-46E0-A69E-D92F775687F1}"
+	RootNamespace="mod_openzap"
+	Keyword="Win32Proj"
+	>
+	<Platforms>
+		<Platform
+			Name="Win32"
+		/>
+	</Platforms>
+	<ToolFiles>
+	</ToolFiles>
+	<Configurations>
+		<Configuration
+			Name="Debug|Win32"
+			OutputDirectory="$(ConfigurationName)"
+			IntermediateDirectory="$(ConfigurationName)"
+			ConfigurationType="2"
+			InheritedPropertySheets="$(VCInstallDir)VCProjectDefaults\UpgradeFromVC71.vsprops"
+			CharacterSet="2"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+				Optimization="0"
+				AdditionalIncludeDirectories="../../freeswitch.trunk/src/include;../src/include;../src/isdn/include"
+				PreprocessorDefinitions="WIN32;_DEBUG;_WINDOWS;_USRDLL;MOD_EXPORTS"
+				MinimalRebuild="true"
+				BasicRuntimeChecks="3"
+				RuntimeLibrary="3"
+				UsePrecompiledHeader="0"
+				WarningLevel="4"
+				WarnAsError="true"
+				Detect64BitPortabilityProblems="true"
+				DebugInformationFormat="3"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				AdditionalDependencies="FreeSwitchCore.lib"
+				OutputFile="$(SolutionDir)$(OutDir)/mod/$(InputName).dll"
+				LinkIncremental="2"
+				AdditionalLibraryDirectories="&quot;../../freeswitch.trunk/w32/Library/$(OutDir)&quot;"
+				GenerateDebugInformation="true"
+				ProgramDatabaseFile="$(OutDir)$(TargetName).pdb"
+				SubSystem="2"
+				ImportLibrary="$(OutDir)/mod_openzap.lib"
+				TargetMachine="1"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCWebDeploymentTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+		<Configuration
+			Name="Release|Win32"
+			OutputDirectory="$(ConfigurationName)"
+			IntermediateDirectory="$(ConfigurationName)"
+			ConfigurationType="2"
+			InheritedPropertySheets="$(VCInstallDir)VCProjectDefaults\UpgradeFromVC71.vsprops"
+			CharacterSet="2"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+				AdditionalIncludeDirectories="../../freeswitch.trunk/src/include;../src/include;../src/isdn/include"
+				PreprocessorDefinitions="WIN32;NDEBUG;_WINDOWS;_USRDLL;MOD_EXPORTS"
+				RuntimeLibrary="2"
+				UsePrecompiledHeader="0"
+				WarningLevel="4"
+				WarnAsError="true"
+				Detect64BitPortabilityProblems="true"
+				DebugInformationFormat="3"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				AdditionalDependencies="FreeSwitchCore.lib"
+				OutputFile="$(SolutionDir)$(OutDir)/mod/$(InputName).dll"
+				LinkIncremental="1"
+				AdditionalLibraryDirectories="&quot;../../freeswitch.trunk/w32/Library/$(OutDir)&quot;"
+				GenerateDebugInformation="true"
+				ProgramDatabaseFile="$(OutDir)$(TargetName).pdb"
+				SubSystem="2"
+				OptimizeReferences="2"
+				EnableCOMDATFolding="2"
+				LinkTimeCodeGeneration="1"
+				ImportLibrary="$(OutDir)/mod_openzap.lib"
+				TargetMachine="1"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCWebDeploymentTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+	</Configurations>
+	<References>
+	</References>
+	<Files>
+		<Filter
+			Name="Source Files"
+			Filter="cpp;c;cxx;def;odl;idl;hpj;bat;asm;asmx"
+			UniqueIdentifier="{4FC737F1-C7A5-4376-A066-2A32D752A2FF}"
+			>
+			<File
+				RelativePath=".\mod_openzap.c"
+				>
+			</File>
+		</Filter>
+	</Files>
+	<Globals>
+	</Globals>
+</VisualStudioProject>
diff --git a/libs/freetdm/msvc/testanalog/testanalog.vcproj b/libs/freetdm/msvc/testanalog/testanalog.vcproj
index df5ccd2fba..7f762fe4ad 100644
--- a/libs/freetdm/msvc/testanalog/testanalog.vcproj
+++ b/libs/freetdm/msvc/testanalog/testanalog.vcproj
@@ -47,7 +47,8 @@
 				BasicRuntimeChecks="3"
 				RuntimeLibrary="3"
 				UsePrecompiledHeader="0"
-				WarningLevel="3"
+				WarningLevel="4"
+				WarnAsError="true"
 				Detect64BitPortabilityProblems="true"
 				DebugInformationFormat="4"
 			/>
@@ -122,7 +123,8 @@
 				PreprocessorDefinitions="WIN32;NDEBUG;_CONSOLE"
 				RuntimeLibrary="2"
 				UsePrecompiledHeader="0"
-				WarningLevel="3"
+				WarningLevel="4"
+				WarnAsError="true"
 				Detect64BitPortabilityProblems="true"
 				DebugInformationFormat="3"
 			/>
diff --git a/libs/freetdm/msvc/testisdn/testisdn.vcproj b/libs/freetdm/msvc/testisdn/testisdn.vcproj
index dac179de1a..cce13b7653 100644
--- a/libs/freetdm/msvc/testisdn/testisdn.vcproj
+++ b/libs/freetdm/msvc/testisdn/testisdn.vcproj
@@ -47,7 +47,8 @@
 				BasicRuntimeChecks="3"
 				RuntimeLibrary="3"
 				UsePrecompiledHeader="0"
-				WarningLevel="3"
+				WarningLevel="4"
+				WarnAsError="true"
 				Detect64BitPortabilityProblems="true"
 				DebugInformationFormat="4"
 			/>
@@ -122,7 +123,8 @@
 				PreprocessorDefinitions="WIN32;NDEBUG;_CONSOLE"
 				RuntimeLibrary="2"
 				UsePrecompiledHeader="0"
-				WarningLevel="3"
+				WarningLevel="4"
+				WarnAsError="true"
 				Detect64BitPortabilityProblems="true"
 				DebugInformationFormat="3"
 			/>
diff --git a/libs/freetdm/openzap.sln b/libs/freetdm/openzap.sln
index 873dd25d72..ab53115d35 100644
--- a/libs/freetdm/openzap.sln
+++ b/libs/freetdm/openzap.sln
@@ -21,6 +21,11 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "testisdn", "msvc\testisdn\t
 		{93B8812C-3EC4-4F78-8970-FFBFC99E167D} = {93B8812C-3EC4-4F78-8970-FFBFC99E167D}
 	EndProjectSection
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "mod_openzap", "mod_openzap\mod_openzap.vcproj", "{FE3540C5-3303-46E0-A69E-D92F775687F1}"
+	ProjectSection(ProjectDependencies) = postProject
+		{93B8812C-3EC4-4F78-8970-FFBFC99E167D} = {93B8812C-3EC4-4F78-8970-FFBFC99E167D}
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Win32 = Debug|Win32
@@ -39,6 +44,10 @@ Global
 		{6DA6FD42-641D-4147-92F5-3BC4AAA6589B}.Debug|Win32.Build.0 = Debug|Win32
 		{6DA6FD42-641D-4147-92F5-3BC4AAA6589B}.Release|Win32.ActiveCfg = Release|Win32
 		{6DA6FD42-641D-4147-92F5-3BC4AAA6589B}.Release|Win32.Build.0 = Release|Win32
+		{FE3540C5-3303-46E0-A69E-D92F775687F1}.Debug|Win32.ActiveCfg = Debug|Win32
+		{FE3540C5-3303-46E0-A69E-D92F775687F1}.Debug|Win32.Build.0 = Debug|Win32
+		{FE3540C5-3303-46E0-A69E-D92F775687F1}.Release|Win32.ActiveCfg = Release|Win32
+		{FE3540C5-3303-46E0-A69E-D92F775687F1}.Release|Win32.Build.0 = Release|Win32
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE