Call this member function to determine whether the web browser is in theater mode.
BOOL GetTheaterMode( ) const;
Nonzero if the web browser is in theater mode; otherwise zero.
When the web browser is in theater mode, the browser main window fills the entire screen, a toolbar with a minimal set of navigational tools appears, and the status bar appears in the upper right-hand corner of the screen.
Applies to Internet Explorer and WebBrowser.