IMessengerContact::Blocked property

Artikel
05/31/2018

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

Sets or retrieves a Boolean value that declares whether the contact associated with this MessengerContact object is blocked by the current client user.

This property is read/write.

Syntax

HRESULT put_Blocked(
           VARIANT_BOOL vBoolBlock
);

HRESULT get_Blocked(
  [retval] VARIANT_BOOL *pBoolBlock
);

Property value

Error codes

Returns one of the following values.

Name	Meaning
S_OK	Success.
S_FALSE	Attempted to block an already blocked user or unblock a user who was not blocked.
E_FAIL	General internal failure.
DISP_E_BADVARTYPE	Error returned by VARIANT handling library.
E_OUTOFMEMORY	Error returned by VARIANT handling library.
E_INVALIDARG	Requested an out-of-range property. This is not normally returned through this interface because the API calls a property that is known to be in range.
RPC_X_NULL_REF_POINTER	pBoolBlock is a NULL pointer.

Remarks

The following table lists error codes returned by this method.

Error Code	Meaning
0x80004005	General internal failure.
0x8007000E	Error returned by VARIANT handling library.
0x80070057	Requested an out-of-range property. This is not normally returned through this interface because the API calls a property that is known to be in range.

Blocking is not necessarily reciprocal. User A may have blocked User B, but if User B hasn't blocked User A, then User A can still receive status updates about User B (if User B is on User A's contact list). Blocking a user does not remove the user from the Contact List or the MessengerContacts collection. Clients should decide how to enforce a logical relationship between blocking users and getting blocked users out of the Contact List.

Assuming the MessengerContact object can be successfully created (which can only be done with an online client), calling this method against a MessengerContact object while the client is offline will always return pBoolBlock==FALSE, even if the contact in question really is blocked. Property information cannot be determined while offline, but will not throw an error.

Blocking is not necessarily reciprocal. User A may have blocked User B, but if User B has not blocked User A, then User A can still receive status updates about User B (if User B is on User A's contact list). Blocking a user does not remove the user from the contact list or the MessengerContacts collection. Clients should decide how to enforce a logical relationship between blocking users and getting blocked users out of the Contact List.

Assuming the MessengerContacts object can be successfully created (which can only be done with an online client), calling this method against a MessengerContact object while the client is offline will always return FALSE, even if the contact in question really is blocked. Property information cannot be determined while offline, but will not throw an error.

Note

This property is not available for scripting languages.

Examples

The following Visual Basic example shows the use of this method.

Public WithEvents MsgrUIA As MessengerAPI.Messenger
Public MsgrContact As MessengerAPI.IMessengerContact

Private Sub btnBlocked_Click()
    On Error Resume Next
    Dim strSigninName As String
    Dim strServiceID As String
    'Get selected contact
    strSigninName = ListContact.SelectedItem.SubItems(2)
    strServiceID = ListContact.SelectedItem.SubItems(5)
    Set MsgrContact = Nothing
    Set MsgrContact = MsgrUIA.GetContact(strSigninName, strServiceID)
    ErrorTrap ("GetContact")    'Error handling routine
    If MsgrContact.Blocked = True Then
        MsgrContact.Blocked = False
        MsgBox("Contact: " & CStr(MsgrContact.SigninName) & " is now Unblocked")
    Else
        MsgrContact.Blocked = True
        MsgBox("Contact: " & CStr(MsgrContact.SigninName) & " is now Blocked")
    End If
    ErrorTrap ("Contact.Blocked")   'Error handling routine
    populateListView    'Refresh contact list
End Sub

Requirements


End of client support	Windows XP
End of server support	Windows Server 2003
Header	Msgrua.h
IDL	Msgrua.idl
DLL	Msgsc.dll

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