~~Title: FilesystemChangeData~~
<pageheader/>

A [[:scripting:script_add-ins|script add-in]] can monitor file and folder changes by implementing the **[[..:scripting_events:onfilesystemchange|OnFilesystemChange]]** event and calling the **[[fsutil|FSUtil]].WatchChanges** method to establish monitoring.


<commandtable columns="3" id="cmdtable_1">
$$ Property Name
$$ Return Type
$$ Description
$$ id
$$ //string//
$$ Returns the ID of the watcher that detected a file or folder change. This ID is assigned when you create the watcher in the call to **[[fsutil|FSUtil]].WatchChanges**.
</commandtable>