diff --git a/src/MyFirstUDRKit.cpp b/src/MyFirstUDRKit.cpp
index 010e446..27a6a66 100644
--- a/src/MyFirstUDRKit.cpp
+++ b/src/MyFirstUDRKit.cpp
@@ -107,6 +107,27 @@ FB_UDR_END_FUNCTION
 
 
 
+/*** DDL
+ create function BillDate (
+	 d    integer,
+	 date
+	 ) returns date
+	 external name 'my_first_udr_kit!MFK_BillDate'
+	 engine udr;
+	 ***/
+FB_UDR_BEGIN_FUNCTION(MFK_BillDate)
+
+FB_UDR_MESSAGE(InMessage,
+	(FB_INTEGER, d)
+	(FB_INTEGER, date)
+);
+FB_UDR_MESSAGE(OutMessage,
+	(FB_DATE, result)
+	);
+
+
+FB_UDR_END_FUNCTION
+