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Notifies the IM client application that the list of contacts available to current user on the IM server has been changed. The user can receive a list of available contacts from the IM server to change his Contact List. NOTIFY_CONTACTS_CHANGED is sent in the form of a WM_NOTIFY_SERVER message.

NOTIFY_CONTACTS_CHANGED     lParamValue = lParam;


This parameter is not used and set to 0.

Return Value

The return value is ignored.