While the Object Pascal language does not allow a direct assignment of a file variable, you can use the Move() procedure to move the contents of the variable to another variable. Note: If you save the record to a file for recall at a later date, you will need to re-initialize the file variable.

Example:
  TMyRec = Record
    f : file;
    OtherField : integer;
  end;
procedure TForm .Button Click(Sender: TObject);
var
  f : file;
  MyRec : TMyRec;
begin
  AssignFile(f, 'SomeFile.txt');
 {This line will not compile}
  MyRec.f := f;
 {This line will!}
  Move(f, MyRec.f, sizeof(f));
  Rewrite(MyRec.f);
  CloseFile(MyRec.f);
end;