d8c63c8f__Glines___Chapter_10__Dialogs___Modality
[Type of Dialog] Error [When to Use It] To tell users about an error they've made in interacting with your application. [Modality] 
Application-modal
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)