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Will notify all registered notifiers a change is about to occur.
ChangeReason - Reason why the change notification is used.
Source - Reference to an interface instance linked to the change. See the description of
TDataProviderChangeReason to see the expected interface instances in each case.
Call Changing to notify all registered change notifiers (IvDataProviderNotify instances registered by a call to RegisterChangeNotify) a change is about to occur.<br>
IJvDataProvider.Changed, IJvDataProvider.RegisterChangeNotify, IJvDataProviderNotify
Last changed by obones on 2009-01-04 21:13:59 CET
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