I have two questions:

First is - does anybody have good and fast solutions for this:
After user who does data input logins, he/she goes to input data. I want to have table with data who, when (datetime), [from which computer,] input data. I know that it has to be done in the Event procedure in After.... Anybody has good solution for this?

Second is - does anybody have good solutions for linked forms - if Master form has its details - in its Detail form then it cannot be changed - means - master form can be changed just if its Detail form is empty. Also - if data in any form is older than - let's say - 2 days (link to system clock) it cannot be changed also. Anybody has solutions?