first, you will want to link to the tables ...
1. click on the EXTERNAL DATA ribbon
2. click the Access icon in the Import & Link section
3. click the "Link" option (instead of Import option) -- I do this first so I don't forget even though it is on the bottom
4. Browse to the back-end database file
5. click OK
then pick your tables when the dialog box pops up
Once you are linked, you can use the tables just like they were really in your database -- everything except change the design of them (for that, you must open the database that holds them directly)
> "pull the data from table to the form"
forms are used to add and edit data stored in tables ... they don't actually hold the data

~
> "help me with some sample codes"
you may not need any code ... click on the CREATE ribbon and then click one of the icons in the Forms group. I have a video tutorial here showing how to create a continuous form:
Learn Access -6- Create a Continuous Form in Microsoft Access
https://www.youtube.com/watch?v=norAB9QvIls&list=PL1B2705CCB40CA4CA
- includes many tips for designing forms efficiently