The flags parameter passed to an application-defined mouse over hot spot procedure (described in the section "Mouse Over Hot Spot Procedure" ) specifies a type of mouse action for a hot spot. These constants define the available hot spot actions:
enum {
kQTVRHotSpotEnter = 0,
kQTVRHotSpotWithin = 1,
kQTVRHotSpotLeave = 2
};