Hi,
All the core API are on the WebView class. You can take a look of the reference for this class and you should be able to easily find the corresponding events/methods:
https://www.essentialobjects.com/doc/eo.webbrowser.webview.aspxNote that since it's a completely different browser engine, there isn't a one to one correspondence between our API and WebControl's API --- for example, there is no correspondance to ProgressChanged event on our API, even though we do provide file downloading program information.
BeforeRequestLoad event is the correct event for you to capture all postdata. This event is always fired, but the actual post data is delay loaded until you fetch them. So there is little overhead as soon as you do not fetch the data.
Thanks!