Action Closes the target window.
If the user presses cancel, the verb returns false, and the script should terminate. If the user confirms by clicking on OK, the window is closed and the verb returns true. The target window will close without a confirmation dialog, and the verb returns true if it was able to close the file. This verb is only implemented in the Mac OS version of Frontier. If app.closeWindow was able to close the window, it sets the target window to the empty string.