How to Read Query String Parameters from the URL Returned by a Third-Party App

Summary: I'm seeking a solution to read query string parameters from the URL of a VB app returned by a third-party app. We're integrating a VB app with a third-party app, and the third-party app provides transaction information by appending its as query string parameters to the URL when returning to the VB app. 

For example,

<VB App URL>/?id=12ba04be-6e4860ddc117&event=Send

Here, 'id' and 'event' are query string parameters.

I'm looking for a method to extract and utilise these parameters in the VB app.

Version (include the version you are using, if applicable):

23.07.1