As an example, let's say you are the developer of an e-mail program. You could write a plug-in that periodically checks the user's mail server for new mail. If any is found, that widget could start flashing, and if the user clicks on it, the e-mail client would be started to retrieve the new mail.

An &xcenter; widget is basically a PM window class, so anybody who has written a PM program before should be able to write an &xcenter; plug-in DLL. You do not need to know WPS and/or SOM programming.

For details, please refer to the Writing &xcenter; plugins section.