d8c63c8f__Glines___Chapter_10__Dialogs___Modality
[Type of Dialog] Information [When to Use It] To give users information that's of immediate importance. Use this type of dialog sparingly; use a status area in one of your primary application windows for the less important messages (see “Status Areas in Primary Windows” in Chapter 6). [Modality] 
Modeless
M o d e l e s s o r m o d a l
A p p l i c a t i o n - m o d a l
M o d e l e s s
SGI TPL (IRIX 6.5: Developer/UI_Glines - Chapter 10. Dialogs)