using txt file as database

hi all so

this is my first post on here and i have few questions and this is the first one

ok i am using a file name data.txt as a database

i have a form and there is a text and a buttom.this is the text file

jan;green;6;....

now i want if in text box was jan give use a msg and show the rest of info in form
the problem is i dont know how to read from txt file while is something like this



jan;green;6;....
dany;west;7;....


i must read the name (i mean the first part of line)


now can somebody help me how to do a serach in text file for name and get the other info if find it???

i am newbie so if it possible talk clear!