Direk aus der Delphi Online-Hilfe zu MsgWaitForMultipleObjects:
Requirements
Client: Included in Windows XP, Windows 2000 Professional, Windows NT Workstation, Windows Me, Windows 98, and Windows 95.
Server: Included in Windows Server 2003, Windows 2000 Server, and Windows NT Server.
Header: Declared in Winuser.h; include Windows.h.
Library: Use User32.lib.
Plan B ist es, direkt bei Microsoft nachzusehen:
MsgWaitForMultipleObjects