I got the rss file from the book "Developing Series 60 Applications A Guide for Symbian OS C++ Developers", sample code "SimpleDlg", I comment out the flag option one by one, but not found much difference. Esepcially the EEikDialogFlagModeless which is stressed in the book.

Can anybody give me some clue?

flags= EEikDialogFlagFillAppClientRect;
// EEikDialogFlagNoDrag |
// EEikDialogFlagNoTitleBar |
// EEikDialogFlagFillAppClientRect;
// EEikDialogFlagCbaButtons;
// EEikDialogFlagModeless;