Dialog box
Object Window...
Window
A box that asks a person to make a decision about an individual object or topic is called a dialog box. It is a small window that shows information that the user needs to respond to promptly.
A form can be created to show just a single record.
If you are referring to the title at the top of the window it is called a "Title Bar"
window
window
window
Status Bar
No
Pane
Pane