kDMNotifyRequestConnectionProbe

Header: Displays.h

enum {
    kDMNotifyRequestConnectionProbe = ,
    kDMNotifyInstalled = 1,
    kDMNotifyEvent = 2,
    kDMNotifyRemoved = 3,
    kDMNotifyPrep = 4,
    kDMNotifyExtendEvent = 5,
    kDMNotifyDependents = 6,
    kDMNotifySuspendConfigure = 7,
    kDMNotifyResumeConfigure = 8,
    kDMNotifyRequestDisplayProbe = 9,
    kExtendedNotificationProc = 65536
};

Constant descriptions

kDMNotifyRequestConnectionProbe
kDMNotifyInstalled: The Display Manager provides this message during a callback function to if your application has installed an extended notification procedure pointer for the first time. The Display Manager provides this message in the notifyData parameter of DMExtendedNotificationProcPtr (page 1).
kDMNotifyEvent: The Display Manager provides this message when an Apple event update occurs, after a display configuration change is made. This is the only time non-extended notifications are called.
kDMNotifyRemoved: The Display Manager provides this message when the function DMRemoveExtendedNotifyProc is called on your function.
kDMNotifyPrep: Before passing kDMSNotifyRemoved, the Display Manager provides this message to indicate that it is about to begin to configure. Calling DMBeginConfigureDisplays tells the Display Manager to send this message.
kDMNotifyExtendEvent
kDMNotifyDependents: The Display Manager provides this message to DMSendDependentNotification.
kDMNotifySuspendConfigure: The Display Manager passes this selector to notify your UPP that configuration is temporarily suspended. For instance, if a video game makes a temporary change to the display configuration, the game is expected to resume configuration and restore video before allowing other applications to access the screen.
kDMNotifyResumeConfigure: The Display Manager passes this selector to notify your application when previously suspended configuration is resumed. Your application can then replace windows and icons, and change depth mode if necessary.
kDMNotifyRequestDisplayProbe
kExtendedNotificationProc