[incr Tcl] provides object-oriented extensions to Tcl. For further reference visit: https://www.tcl.tk/man/tcl8.6/ItclCmd/itcl.htm The packages required are available as part of MagicSplat’s binary distributions of Tcl/Tk for Windows. Visit magicsplat.com for more information. name: itcl — object-oriented extensions to Tcl package require Itcl Returns version 4.2.0 TclOO – Object-Oriented Tcl package require TclOO Returns version 1.1.0