How can I just click a certain x y coordinate on a screen regardless of object?

I am testing an application called OnBase.  In this particular instance, when I select certain menus and buttons a screen pops.  The problem I have is when I record, it is recording specific information from the screen which dynamically changes every time that screen displays a new instance.  For example: I recorded something and it built aliases using the number 7431, which happens to be the "appeal number".  When that screen is closed, that appeal number is no longer going to be used on that screen, because when that screen is opened again, it will use the next increment of appeal number.  Therefore, 7431 will no longer be part of the aliases and TestComplete can no longer find the objects which were on that screen.  I need to know how I can just click on an x y location, which will then cause a drop down list and then click again to select a value from the dropdown.  I would need to perform this action many times because again all of the objects on this screen have been built using the appeal number which when replayed no longer exist.  I would like to do this via keyword testing methods, however, if that's not possible and I can be shown how to do via vbscript, that would work as well.  I hope that all makes sense.

I'm using Version 12.31.1833.7.