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QueryForConnectionCallback Delegate

The QueryForConnectionCallback delegate determines whether there is a cached connection available for use.

Namespace: System.DirectoryServices.Protocols
Assembly: System.DirectoryServices.Protocols (in system.directoryservices.protocols.dll)

public delegate LdapConnection^ QueryForConnectionCallback (
	LdapConnection^ primaryConnection, 
	LdapConnection^ referralFromConnection, 
	String^ newDistinguishedName, 
	LdapDirectoryIdentifier^ identifier, 
	NetworkCredential^ credential, 
	long long currentUserToken
/** @delegate */
public delegate LdapConnection QueryForConnectionCallback (
	LdapConnection primaryConnection, 
	LdapConnection referralFromConnection, 
	String newDistinguishedName, 
	LdapDirectoryIdentifier identifier, 
	NetworkCredential credential, 
	long currentUserToken
Not applicable.



A LdapConnection object that specifies the primary connection.


A LdapConnection object that specifies the connection that provides the referral.


A String object that specifies the distinguished name (DN) of the desired entry in the referred server.


A LdapDirectoryIdentifier object that specifies the identifier for the referred LDAP directory.


A NetworkCredential object that specifies the credentials to pass to the referred server.


The LUID for the current user.

Return Value

A cached LdapConnection is returned, if there is one available. If no cached connection is available, NULL is returned.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0