How to close a floating window using AppleScript

Question

One of my application processes occasionally creates a floating window that I'd like to programmatically auto-close.

I have no problem checking for the existence of this window through its name, but then I am unable to close it with neither close window "windowname" nor tell window "windowname" to close. E.g.

tell application "System Events" to tell process "processname"
    if exists window "windowname" then
        close window "windowname"
    end if
end tell

These result in:

error "System Events got an error: window "windowname" of process "processname" doesn’t understand the “close” message."

How can I close this window then?

Answer 1

I can close a Finder window like this. Maybe you can do the same.

tell application "System Events"
    tell process "Finder"
        click button 1 of window 1
    end tell
end tell