Returns the current read/write position within a file opened using the Open statement.
Seek(filenumber)
The filenumber argument is any valid file number.
Seek returns a value between 1 and 2,147,483,647 (equivalent to 231 - 1), inclusive. For files open in Random mode, Seek returns the number of the next record read or written. For files opened in Binary, Output, Append, or Input mode, Seek returns the byte position at which the next operation is to take place. The first byte in a file is at position 1, the second byte is at position 2, and so on.
Get Statement, Open Statement, Put Statement, Seek Statement.
This example uses the Seek function to return the current file position. The example assumes TESTFILE is a file containing records of the user-defined type Record.
Type Record ' Define user-defined type.
ID As Integer
Name As String * 20Type
For files opened in random-file mode, Seek returns number of next record.
Dim MyRecord As Record ' Declare variable."TESTFILE" For Random As #1 Len = Len(MyRecord)While Not EOF(1) ' Loop until end of file.
Get #1, , MyRecord ' Read next record.
Debug.Print Seek(1) ' Print record number to Debug
' window.#1 ' Close file.
For files opened in modes other than Random mode, Seek returns the byte position at which the next operation takes place. Assume TESTFILE is a file containing a few lines of text.
Open "TESTFILE" For Input As #1 ' Open file for reading.While Not EOF(1) ' Loop until end of file.
MyChar = Input(1, #1) ' Read next character of data.
Debug.Print Seek(1) ' Print byte position to Debug
' window.#1 ' Close file.