Action

      Contains a value indicating the notification-calling condition. Action is a bit map that describes the type of notification made to the physical device driver. The bit-map definitions are as follows:

      Bits 15-9

        Reserved. Must equal 0.
      Bit 8
        Action = 256. AIM post-save activation
      Bit 7
        Action = 128. AIM pre-save verification
      Bit 6
        Action = 64. End of session switch
      Bit 5
        Action = 32. Start of session switch
      Bit 4
        Action = 16. Session creation
      Bit 3
        Action = 8. Session termination
      Bit 2
        Action = 4. Post-session restore
      Bit 1
        Action = 2. Post-session save
      Bit 0
        Action = 1. Pre-session save
      Physical device drivers can register for any combination of these notification values by issuing the DOSSMRegisterDD API function. If a physical device driver receives a notification with an Action value it does not support, it returns an ERROR_INVALID_PARAMETER error code.


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