I mean exactly that a built-in field will not fire CustomPropertyChange()
since it's not a custom property. The name tells you exactly what it's for.
Built-in properties fire PropertyChange(), custom ones fire
CustomPropertyChange(). It's very logical.

PropertyChange() should fire if To, Cc or Bcc are changed.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Professional Programming Outlook 2007.
Reminder Manager, Extended Reminders, Attachment Options.
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"ryotyankou via OfficeKB.com" u48591@uwe wrote in message
news:9b402d4cac935@uwe...
Do you mean that the build-in properties can not be changed or repurpose
or
something like that?
Do you mean that CustomPropertyChange only use for controls on custom
form?
Then how could i detect deletion of e-mail addresses in to/cc/bcc fields?