destroy - Destroy one or more windows

       This  command  deletes  the  windows  given by the window arguments, plus all of their descendants.  If a
       window “.”  is deleted then all windows will be destroyed and the application will (normally) exit.   The
       windows  are destroyed in order, and if an error occurs in destroying a window the command aborts without
       destroying the remaining windows.  No error is returned if window does not exist.

       Destroy all checkbuttons that are direct children of the given widget:
              proc killCheckbuttonChildren {parent} {
                 foreach w [winfo children $parent] {
                    if {[winfo class $w] eq "Checkbutton"} {
                       destroy $w
                    }
                 }
              }

       application, destroy, window

Tk                                                                                                  destroy(3tk)

       destroy - Destroy one or more windows

destroy ?windowwindow...?
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