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PrintAsyncNotifyConversationStyle enumeration (prnasnot.h)

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  • Tiempo de lectura: 2 minutos

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

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