Mask outline?

[Ken Norris]

**********
> Date: Wed, 02 Apr 2003 11:20:28 -0800
> Subject: Re: Mask outline?
> From: Scott Rossi <scott at tactilemedia.com>
> 
> Recently, "Tomas Franzén"  wrote:
> 
>> How do I make my images behave the same way bitmaps with the 'mask' ink
>> do in SuperCard? That is, making the surrounding white area transparent.
> 
> Depends what you need to do.  If you're delivering to Mac systems only,
> "transparent" will work fine.  If you need to deliver cross platform, it
> would probably be better to use a GIF image with a built in mask, thereby
> avoiding use of inks all together.  If you need to antialias the image to
> the background (seamless blend between the image and your stack), you can
> use a PNG image with an 8 bit mask.  If you need to be able to change the
> background of the image at will, import a GIF or PNG image, place a draw
> graphic behind the image and set the backColor or the graphic as needed.
> 
> Many options...
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This was my previous question, too, but worded differently. I want to make
some xplatform operating skins.

You can set the backColor to "transparent"?

Are there demos somewhere so we can see how these things are done?

TIA,
Ken N.