Added some error codes.
diff --git a/include/urlmon.h b/include/urlmon.h
index c1c5a4b..c8cac66 100644
--- a/include/urlmon.h
+++ b/include/urlmon.h
@@ -146,6 +146,28 @@
#define MK_S_ASYNCHRONOUS 0x000401E8
#define S_ASYNCHRONOUS MK_S_ASYNCHRONOUS
+#define INET_E_ERROR_FIRST 0x800C0002L
+#define INET_E_INVALID_URL 0x800C0002L
+#define INET_E_NO_SESSION 0x800C0003L
+#define INET_E_CANNOT_CONNECT 0x800C0004L
+#define INET_E_RESOURCE_NOT_FOUND 0x800C0005L
+#define INET_E_OBJECT_NOT_FOUND 0x800C0006L
+#define INET_E_DATA_NOT_AVAILABLE 0x800C0007L
+#define INET_E_DOWNLOAD_FAILURE 0x800C0008L
+#define INET_E_AUTHENTICATION_REQUIRED 0x800C0009L
+#define INET_E_NO_VALID_MEDIA 0x800C000AL
+#define INET_E_CONNECTION_TIMEOUT 0x800C000BL
+#define INET_E_INVALID_REQUEST 0x800C000CL
+#define INET_E_UNKNOWN_PROTOCOL 0x800C000DL
+#define INET_E_SECURITY_PROBLEM 0x800C000EL
+#define INET_E_CANNOT_LOAD_DATA 0x800C000FL
+#define INET_E_CANNOT_INSTANTIATE_OBJECT 0x800C0010L
+#define INET_E_REDIRECT_FAILED 0x800C0014L
+#define INET_E_REDIRECT_TO_DIR 0x800C0015L
+#define INET_E_CANNOT_LOCK_REQUEST 0x800C0016L
+#define INET_E_ERROR_LAST INET_E_REDIRECT_TO_DIR
+
+
/*****************************************************************************
* IBinding interface
*/
