... Note that by default AlertIf function does not generate repetitive signals when the same scan is run multiple times. During experimentation, you may prefer to get repeated signals in subsequent scans. To do so, you should change default flags to 1 + 2:
I think that the default functionality is probably all you need; however, if you still want to see some popup windows, one possibility is to use it with the EXEC version of the command to launch a script to create your popup messages using the Windows Script Host WshShell.Popup() method.
One nice feature of this method is that it accepts a param to specify the maximum number of seconds the dialog box will be displayed (then the popup will close automatically):
Use the AlertIf() 3rd param ("text") to properly encode in a parsable string what you want to display in the popup dialog (for instance a message with Name()/FullName(), datetime of the alert, formula name, and a timeout) and then use the WScript.Arguments collection to access/use these items to create your popups.