Problem with TestComplete locating a pop up

Thanks, baxatob!  I am finding I am going down quite the rabbit hole with this.
Can you give me an example syntax for doing this?  TestComplete seems to want me to "define" the Page object.

When you say, "Try to interact with Page object instead of BrowserWindow"

I understand I can look at the page object and work with its methods... but I find that it tells me that the page object is undefined, and I am clearly not either referencing it properly or defining it to TestComplete's satisfaction.

Conceptually I am trying to locate the window and change the focus to the window so I can then perform some actions on that window.  I could also try to locate all the children of "Sys" that are browser windows, and pick the one with the URL in question, but it seems like that is not how TestComplete "works".

Part of the problem may be that I am in keyword mode where I feel like my low-level control of what is happening may be limited, but I have only used the script mode for piecemeal things.

Thanks!

Erik

https://support.smartbear.com/testcomplete/docs/reference/test-objects/controls/web/general/page/methods.html

https://developer.mozilla.org/en-US/docs/Web/API/Window