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The ltmmDVD_RELATIVE_BUTTON constants identify the four directional buttons used for digital video disc (DVD) menu navigation and other operations. The values listed below can be used with the IltmmDVDControl interface.
typedef enum ltmmDVD_RELATIVE_BUTTON{ltmmDVD_Relative_Upper = 1,ltmmDVD_Relative_Lower = 2,ltmmDVD_Relative_Left = 3,ltmmDVD_Relative_Right = 4} ltmmDVD_RELATIVE_BUTTON;
[1] Upper button.
[2] Lower button.
[3] Left button.
[4] Right button.
For more detailed information, see the Microsoft documentation for the DVD_RELATIVE_BUTTON Enumeration.
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