Well to start with read the VB help file related to the "Print" statement and look at the example (I've copied it below). Then look up the "Input" statement.
From the VB5 help file
This example uses the Print # statement to write data to a file.
Open "TESTFILE" For Output As #1 ' Open file for output.
Print #1, "This is a test" ' Print text to file.
Print #1, ' Print blank line to file.
Print #1, "Zone 1"; Tab ; "Zone 2" ' Print in two print zones.
Print #1, "Hello" ; " " ; "World" ' Separate strings with space.
Print #1, Spc(5) ; "5 leading spaces " ' Print five leading spaces.
Print #1, Tab(10) ; "Hello" ' Print word at column 10.
' Assign Boolean, Date, Null and Error values.
Dim MyBool, MyDate, MyNull, MyError
MyBool = False : MyDate = #February 12, 1969# : MyNull = Null
MyError = CVErr(32767)
' True, False, Null, and Error are translated using locale settings of
' your system. Date literals are written using standard short date
' format.
Print #1, MyBool ; " is a Boolean value"
Print #1, MyDate ; " is a date"
Print #1, MyNull ; " is a null value"
Print #1, MyError ; " is an error value"
Close #1 ' Close file.