Corion ... thank you very much!

Here's what I put into the PowerPoint module per your guidance on Win32::OLE::Variant (which I looked up on CPAN afterward ... because I should learn how to read)

  # Get the points
  my @points=@{ $options->{points} };

  # Create the Win32::OLE::Variant
  my $pointlist = Win32::OLE::Variant->new(VT_ARRAY | VT_R4 , 4, 2);

  # Convert points to Win32::OLE::Variant
  for my $index (0 .. 3)
  {
    # Add x
    $pointlist->Put( $index, 0, shift(@points) );

    # Add y
    $pointlist->Put( $index, 1, shift(@points) );
  }

  my $new_poly=$self->slide->Shapes->AddPolyline($pointlist);
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So I could make the call into the function simple ...

      # Add filled Triangle
      $PPT->add_polyline( {'points'    => [$pptpoints[0], $pptpoints[1
+], $pptpoints[2], $pptpoints[3], $pptpoints[4], $pptpoints[5], $pptpo
+ints[0], $pptpoints[1]],
                           'fillcolor' => &convert2RGBvalues($fill),
                           'weight'    => $weight/px2pt,
                           'forecolor' => &convert2RGBvalues($color) }
+);
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Meaning the user will only have to define a list of three coordinate pairs in perl to make a triangle in PowerPoint.

EXCELLENT!