Delphi: Change File Attributes of Files

Sometimes you have to change the file attributes of files via Delphi, for example, to hide a file or to give the file a write-portection. That is how to do it:

procedure TForm1.Button1Click(Sender: TObject);
begin
   FileSetAttr('C:\File.txt', faHidden);
end;

This sets the file to "faHidden", meaning the file will be hidden. Apart from that, the following attributes of the file can be set:

It is also possible to set several attributes at once. This can be accomplished with:

FileSetAttr('C:\File.txt', faHidden + faReadOnly);

This sets the file "File.txt" to hidden and read-only (write protected).