To install Tcl::Tk::Tkwidget::treectrl, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Tcl::Tk::Tkwidget::treectrl
CPAN shell
perl -MCPAN -e shell install Tcl::Tk::Tkwidget::treectrl
For more information on module installation, please visit the detailed CPAN module installation guide.