Section B: Characteristics of a Modeless Dialog Box
A modeless dialog box does not disable its owner window. Therefore, the user can continue to work with the owner window while the modeless dialog box is displayed.
A modeless dialog receives its messages through the application's main message loop.
An application typically calls the IsDialogMessage() function to process keyboard input for the modeless dialog box. IsDialogMessage() handles changing the focus between controls using the keyboard.