Hiya!
Can you give us a little more? You may also find mopre specific answers here if you search beforehand.
(1)If you are referring to dropdowns where user must select, you should use Form_Load and add the data from which users must choose from, form runs and add data to select from
(2)When user selects, and submits...the data selected will then be added to file or location of your choice
(3)A Text box therefore will collect whatever the user adds in, and you shall have it in file/location of you choice.
Again, search this site, if this does not solve your problem
Note: You are asking the right question, there may be different ways of achieving. Please write or if you have already begun part of your code, add it here for more specifics. Good luck!
Dököll