Seek function
Seek( filenumber )
The parameter filenumber is used in the open statement and must be a valid numeric expression.
Seek returns a number that represents the byte position where the next operation is to take place. The first byte in the file is at position 1.
Example
Sub Main
   Open "TESTFILE" For Input As #1   ' Open file for reading.
   Do While Not EOF(1)   ' Loop until end of file.
      MyChar = Input(1, #1)   ' Read next character of data.
      Print Seek(1)   ' Print byte position  .
   Loop
        Close #1   ' Close file.
End Sub