hai
i was going through the sample posted in the following address
http://www.windowsworkflow.net/default.aspx tabindex=4&tabid=41
and the sample name is Workflow Designer Control Example posted by Aditya Bhandarkar
in this i was able to show the ellipse which indicates the errors in
the activity, but i am unable to show the actual errors. could some one help
me out......
thanks
regards
AshokKumar.D

query regarding displaying errors
David Teitlebaum MSFT
Activity Validation sample under samples\technologies\customactivities\validation
might help you. Specially look at the class ValidationActivityValidator in the file ValidationActivity.cs