diff --git a/curl_function.e b/curl_function.e
index 0e481625..83ea6d3f 100644
--- a/curl_function.e
+++ b/curl_function.e
@@ -4,6 +4,10 @@ note
 						We need this class since cURL need a c function pointer as value but
 						Eiffel function need frist parameter of any funciton call is object address.
 						Client programmers can inherit this class to fit their needs.
+
+						Note: descendants of this class have to call `set_object_and_function_address',
+						otherwise cURL would not know how to call Eiffel features (such as `write_function').
+						See example: $ISE_LIBRARY\examples\cURL\upload_and_read_function						
 																											]"
 	status: "See notice at end of class."
 	legal: "See notice at end of class."