showUserSettingsDialog is a new flag. When using either PasteHandleIntoMovie or ConvertFileToMovieFile to import data into a movie, you can now set the showUserSettingsDialog flag. This displays the user settings dialog box for that import operation, if there is one. For example, when importing a picture, this would cause the Standard Compression dialog box to be displayed so the compression method could be selected.
showUserSettingsDialog = 2
See also: QuickTime Tech Note QT4.