workaround for vista service automatic WSAStartup() crash issue

Net/include/Poco/Net/Net.h

@@ -89,4 +89,22 @@
 #endif
 
 
+namespace Poco {
+namespace Net {
+
+
+void initializeNetwork();
+	/// Initialize the network subsystem.
+	/// Calls WSAStartup() on Windows, does nothing
+	/// on other platforms.
+	
+void uninitializeNetwork();
+	/// Uninitialize the network subsystem.
+	/// Calls WSACleanup() on Windows, does nothing
+	/// on other platforms.
+
+
+} } // namespace Poco::Net
+
+
 #endif // Net_Net_INCLUDED

Net/src/DNS.cpp

@@ -50,7 +50,7 @@ using Poco::IOException;
 //
 // Automatic initialization of Windows networking
 //
-#if defined(_WIN32)
+#if defined(_WIN32) && !defined(POCO_NET_NO_AUTOMATIC_WSASTARTUP)
 namespace
 {
 	class NetworkInitializer
@@ -58,14 +58,12 @@ namespace
 	public:
 		NetworkInitializer()
 		{
-			WORD    version = MAKEWORD(2, 2);
+			Poco::Net::initializeNetwork();
-			WSADATA data;
-			WSAStartup(version, &data);
 		}
 		
 		~NetworkInitializer()
 		{
-			WSACleanup();
+			Poco::Net::uninitializeNetwork();
 		}
 	};
 	
@@ -236,4 +234,22 @@ void DNS::error(int code, const std::string& arg)
 }
 
 
+void initializeNetwork()
+{
+#if defined(_WIN32)
+	WORD    version = MAKEWORD(2, 2);
+	WSADATA data;
+	WSAStartup(version, &data);
+#endif // _WIN32
+}
+		
+
+void uninitializeNetwork()
+{
+#if defined(_WIN32)
+	WSACleanup();
+#endif // _WIN32
+}
+
+
 } } // namespace Poco::Net