better way to get ACP

ext/com_dotnet/com_com.c

@@ -52,7 +52,7 @@ PHP_FUNCTION(com_create_instance)
 		RPC_C_AUTHN_LEVEL_DEFAULT, RPC_C_IMP_LEVEL_IMPERSONATE,
 		&authid, EOAC_NONE
 	};
-	zend_long cp = CP_ACP;
+	zend_long cp = GetACP();
 
 	php_com_initialize();
 	obj = CDNO_FETCH(object);

ext/com_dotnet/com_dotnet.c

@@ -196,7 +196,7 @@ PHP_FUNCTION(com_dotnet_create_instance)
 	int ret = FAILURE;
 	char *where = "";
 	IUnknown *unk = NULL;
-	zend_long cp = CP_ACP;
+	zend_long cp = GetACP();
 
 	php_com_initialize();
 	stuff = (struct dotnet_runtime_stuff*)COMG(dotnet_runtime_stuff);