Hi Al:

Thank you for answering.

It was fine to see there people around there who is as confussed as me about "activatecell" method.

Althought I couldn't find a solution in those articles I thought "what about 'beforerowcolchange' method, uh?"

Great! There "activatecell" method really works.

But now I have an unexpected problem. lastkey in valid event is processed two times. One in original valid (first row) and other in new textbox (second row)

Happyness can not be complete.
Héctor