sub MessageBox {
    my ($kind,%args) = @_;
    require Tk::Dialog;
    my $parent = delete $args{'-parent'};
    my $args = \%args;

    $args->{-bitmap} = delete $args->{-icon} if defined $args->{-icon};
    $args->{-text} = delete $args->{-message} if defined $args->{-message};
    $args->{-type} = 'OK' unless defined $args->{-type};

    my $type;
    if (defined($type = delete $args->{-type})) {
	delete $args->{-type};
	my @buttons = grep($_,map(ucfirst($_),
                      split(/(abort|retry|ignore|yes|no|cancel|ok)/,
                            lc($type))));
	$args->{-buttons} = [@buttons];
	$args->{-default_button} = ucfirst(delete $args->{-default}) if
	    defined $args->{-default};
	if (not defined $args->{-default_button} and scalar(@buttons) == 1) {
	   $args->{-default_button} = $buttons[0];
	}
        my $md = $parent->Dialog(%$args);
        my $an = $md->Show;
        $md->destroy if Tk::Exists($md);
        return $an;
    }
} # end messageBox