I have to write a system which will read some DBF from server and display certain info on a form.. I need to refresh the display once per 5 second to ensure it's showing the latest info..

There is another system using those DBF, my job actually is to display the working result of that another system..

But, besides displaying data, the form also have to provide some functions to users and let them modify part of the DBF..

My problem is, I don't know how to read the DBF once per 5 second, at the same time allow users to use the form to do their other jobs.. any suggestion or readings please?

Thank in advance for any help!