use Tkx;

Tkx::wm_title(".", "Feet to Meters");
Tkx::ttk__frame(".c",  -padding => "3 3 12 12");
Tkx::grid( ".c", -column => 0, -row => 0, -sticky => "nwes");
Tkx::grid_columnconfigure( ".", 0, -weight => 1); 
Tkx::grid_rowconfigure(".", 0, -weight => 1);

Tkx::ttk__treeview(".c.tree");
Tkx::grid( ".c.tree", -column => 1, -row =>3, -sticky => "w");