I do not believe we have an equivalent non-ActiveX implementation of the old screen capture control functionality. Many of our clients have moved away from this and utilized other third party tools like Greenshot or Snagit. https://community.pega.com/knowledgebase/articles/deprecation-microsoft-activex-controls-pega-platform

There's a browser extension that Pega uses in the application to capture screenshots and record videos. "Pega Screen and Video Capture" is the extension. 

pega.screen is the javascript object which has few apis for this purpose. 

Not sure if this relevant in your case, but if you want to know more about this, "pyAttachmentMenuWrapper" section is an example of it's usage in Pega. 

Wondering if there is any pega integration with SnagIt to automatically capture the screenshot on click of user action instead of a manual two step process.