DMessengerEvents::OnContactListAdd event

Artikel
05/31/2018

[OnContactListAdd is no longer available for use as of Windows Vista. See Windows Messenger for more information.]

Indicates the result of an attempt to add to the Messenger object's Contact List.

Syntax

void OnContactListAdd(
  [in] LONG      hr,
  [in] IDispatch *pMContact
);

Parameters

hr [in]

Success or error code as a LONG. For a table of the MSGR_E_* constants, see MSGRConstants.

An error result for hr might result in all other event parameters being meaningless, NULL, or otherwise invalid. Always check for a successful hr before attempting to use the other event parameters.

Value	Meaning
S_OK	A contact was successfully added.
MSGR_E_LIST_FULL	The server has determined that the Contact List is already at capacity. This is a server-determined limit.
MSGR_E_ALREADY_IN_LIST	The server has determined that the user to be added is already in the Contact List.
MSGR_E_USER_NOT_FOUND	The user specified to be added does not exist.
MSGR_E_UNEXPECTED	The server has returned an unexpected error code.
MSGR_E_SERVER_TOO_BUSY	The server is not processing requests or not accepting new connections.
MSGR_E_SERVER_UNAVAILABLE	The server was able to be contacted, but was unavailable for unspecified reasons.
E_INVALIDARG	An invalid value was passed into the pMContact parameter.

*pMContact* \[in\]


C++	Pointer to a IDispatch interface on the MessengerContact object where a change in block value was attempted.
VB	A MessengerContact object where a change in block values was attempted.

Return value

This event does not return a value.

Remarks

This event comes in response to a specific user action through the client UI. There is no API for adding a contact to the Contact List.

If you attempt to add a user who is already in a list, you will receive MSGR_E_ALREADY_IN_LIST in response. There is no initial check of client-side lists for the Microsoft .NET Messenger Service before submission as a protocol, although it is possible that other services might implement a client-side check that would issue an event locally in this situation and submit no protocol message for some of the error cases.

To be used when writing custom ::Invoke methods to handle these events.

Parameter	vaArgs[x]	Variant Type
pMContact	0	VT_DISPATCH
pMGroup	1	VT_DISPATCH
hr	2	VT_I4

The same DISPID is defined on DMessengerPrivateEvents, and so the event also occurs on the MessengerPriv object.

Note

This event is available for scripting languages.

Requirements


Minimum supported client	Windows 2000 Professional, Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
End of client support	Windows XP
End of server support	Windows Server 2003
Product	Messenger 4.5
Header	Msgrua.h
IDL	Msgrua.idl
DLL	Msgsc.dll

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