3. Dialogs
A DIALOG IS DEFINED BY ITS USE. If a form is the application's main window, it's a window and not a dialog. However, if a form pops up in response to a user request for service, such as a request to open a file, and stops all other user interactions with the application, it's a dialog (specifically, a modal dialog).
However, things get a little murky when we consider modeless dialogs, such as Outlook's Send/Receive Progress dialog. Modeless dialogs don't stop the user from interacting with the rest of the application, but they do provide a means of interaction outside the main window.
The Windows Forms terminology makes things even murkier. Standard dialogs are exposed by the XxxDialog family of components, such as OpenFileDialog. ...
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