This question has been done.Use DataSet's Merge method can do this.thank you. Always do you best,what you plant you will harvest later!

Hi, Could you please reiterate the question? Keshav Kamat :) India

Harry, What are you staring with, a Dialog based application? Do you want to create another Dialog that you can po up from the intial one? Bt the way, it will help you a lot, a lot, a lot, if you give a subject in you post that is indeed the subject you are inquiring about. If you just put "help" then it possible that many people who could help you will just pass over you post. Read Chris's points also. They are the first post in this forum. :)

I still can't understand your description Harry. Try explaining a bit more clearly, leaving out unnecessary descriptions. Perhaps, tell us what data structures/types will the solution include if u know beforehand. Maybe somebody will understand a bit better if u do that. Regards, Polis Can you practice what you teach?

harry~ wrote: I built this software for a collage, if you know how to solve this problem ,please tell me . Well, in general, one idea is to make an array of time slots. Let's say the events are every 15 minutes. So you have an array for each each person that, when they sign up for an event, fills in however long each event takes, starting at the appropriate 15 minute indexed interval. Then, when they sign up for another event, check the array to see if there's a time overlap. You probably also need to take into account the time it takes to leave one event and get to another, so you can't have someone sign up for an event that ends at 1:30 and another that starts at 1:30, because they can't get to the next event in time! Marc MyXaml Advanced Unit Testing YAPO