dnsapi: Add some constants.

[Francois Gouget]

---
 include/windns.h |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/include/windns.h b/include/windns.h
index 326bbf2..7c02a5c 100644
--- a/include/windns.h
+++ b/include/windns.h
@@ -163,6 +163,13 @@ typedef struct
     DWORD IP6Dword[4];
 } IP6_ADDRESS, *PIP6_ADDRESS, DNS_IP6_ADDRESS, *PDNS_IP6_ADDRESS;
 
+#define SIZEOF_IP4_ADDRESS                   4
+#define IP4_ADDRESS_STRING_LENGTH           16
+#define IP6_ADDRESS_STRING_LENGTH           65
+#define DNS_ADDRESS_STRING_LENGTH           IP6_ADDRESS_STRING_LENGTH
+#define IP4_ADDRESS_STRING_BUFFER_LENGTH    IP4_ADDRESS_STRING_LENGTH
+#define IP6_ADDRESS_STRING_BUFFER_LENGTH    IP6_ADDRESS_STRING_LENGTH
+
 typedef struct _IP4_ARRAY
 {
     DWORD AddrCount;
-- 
1.4.4.4