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PrintAsyncNotifyConversationStyle enumeration (prnasnot.h)

  • Article

Specifies whether communication is bidirectional or unidirectional between applications and Print Spooler-hosted components such as printer drivers, print processors, and port monitors.

Syntax

typedef enum {
  kBiDirectional,
  kUniDirectional
} PrintAsyncNotifyConversationStyle;

Constants

 
kBiDirectional
Indicates that applications can send replies to the Print Spooler-hosted component that sent a notification.
kUniDirectional
Indicates that communication goes only from the Print Spooler-hosted component to one or more listening applications.

Remarks

Even when the communication is bidirectional, applications cannot initiate communication. They can only reply to notifications sent by the Print Spooler-hosted components.

When multiple applications listen for bidirectional notifications, they receive only the first notification sent through a bidirectional channel. The Print Spooler maintains the channel only with the first listening application that responded, and discards all subsequent replies from other listeners.

Requirements

Requirement Value
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2008 [desktop apps only]
Header prnasnot.h