Platform SDK: Exchange Server

Sample Event Extension

This sample adds a new-mail event handler to the messaging client.

Quick Info

Executable:	EVEXT.DLL
Directory for source code:	EVENTS.EXT
Written in:	C++
Supports:	Win32 platforms only

Supported Features

Reading message text before being displayed in the read note form
Reading message text as it is submitted to MAPI
Reply to Sender context

Remarks

This sample uses a very basic form of signing a message. A checksum on the message as it is written is stored as a custom property. Upon reading the message, the extension verifies the checksum and displays one of two possible outcomes: the message has been verified with correct contents, or the message text has been altered.