TOpenOption.ofNoReadOnlyReturn value

Indicates that a dialog cannot be used to choose a read-only file. For the Windows platform, TOpenDialog displays an error message if a read-only file is selected - but it does not close the dialog. TSaveDialog will always display an error message if the user selects a read-only file - regardless of the state of this flag. For other platforms, TOpenDiaLog / TSaveDialog use the value to ensure that a file or directory selected with the dialog has write access permissions. A 'File is not writable' error message is displayed if the file or directory is read-only. See TOpenDialog.CheckFile.