The ltmmDVD_Domain constants indicate the state of a DVD player. The values listed below can be used with some of the IltmmDVDControl interface functions.
typedef enum ltmmDVD_DOMAIN
ltmmDVD_DOMAIN_FirstPlay = 1,
 player is doing default initialization of a DVD disc.
 player is displaying menus for whole disc.
 player is displaying menus for current title set.
 player is displaying current title.
 player is in stopped state.
For more detailed information, see the Microsoft documentation for the DVD_DOMAIN Enumeration.
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