FileSeek

Set the current file position on a file handle.

Declaration

Source position: line 0

function FileSeek(

Handle: THandle;

FOffset: LongInt;

Origin: LongInt

):LongInt; function FileSeek(

Handle: THandle;

FOffset: Int64;

Origin: LongInt

):Int64;

Description

FileSeek sets the file pointer on position Offset, starting from Origin. Origin can be one of the following values:

fsFromBeginning: Offset is relative to the first byte of the file. This position is zero-based. i.e. the first byte is at offset 0.
fsFromCurrent: Offset is relative to the current position.
fsFromEnd: Offset is relative to the end of the file. This means that Offset can only be zero or negative in this case.

If successfull, the function returns the new file position, relative to the beginning of the file.

Remark:

The abovementioned constants do not exist in Delphi.

Errors

On error, -1 is returned.

Example

Program Example42;

{ This program demonstrates the FileSetAttr function }

Uses sysutils;

Begin
  If FileSetAttr ('ex40.pp',faReadOnly or faHidden)=0 then
    Writeln ('Successfully made file hidden and read-only.')
  else
    Writeln ('Coulnd''t make file hidden and read-only.');
End.

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