I wrote a gui using Tk and changed button colours successfully. I upgraded my ActiveState perl and found that Tk no longer builds correctly so I changed to Tkx. Now I can't configure a button's background colour despite finding various examples showing me that I should do as follows: 
use Tkx;
my $mw = Tkx::widget->new(".");
my $calc = $mw->new_ttk__button(-text=>"Calculate", -command=>sub {cal
+culate();});
$calc->g_grid(-column=>1,-row=>3,-columnspan=>2,-sticky=>"ew");
$calc->g_bind("<Enter>",
 sub {$calc->configure(-background=>'red');});
Tkx::MainLoop();

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I get the following error which is fairly self-explanatory except that I understood, from what doc (mainly Tk, NOT Tkx) that it should work. 
unknown option "-background" at /TestCode/configtest.pl line 5.
unknown option "-background"
    while executing
".b configure -background red"
    invoked from within
"::perl::CODE(0x4af0d4)"
    (command bound to event)

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Am I attempting the impossible or do I need some other module to discover these attributes?

In reply to Limitations with Tkx configure options? by murrayn

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