Custom brushes in Flash like Photoshop?

Question

I just started using Flash for my animations and I want to ask if one can create custom brushes in Flash like Photoshop?
Also I imported an embeded video avi into Flash and I want to reduce the opacity of the video so I can create a new layer over it and draw over the frames with the video as reference.I dragged the movie into the stage and converted to movie clip and reduced the opacity but its not showing on the stage when I go to the part of the video I want to draw over.
I use Flash CS3.
BTW,why isn't the bucket tool & selection tool like Photoshop?It makes shading colours problematic?or is it because its vector?

Answer 1

I was not able to access the mc inside the scroll pane with the code:
TweenLite.to(mc_pane2.content.scrollpaneBckgrnd_mc.FloraLytell_btn, 1,
I had to explicitly specify that it is the mc I am accessing inside the
scroll pane, otherwise I was getting errors:
TweenLite.to(MovieClip(mc_pane2.content).scrollpaneBckgrnd_mc.FloraLyt ell_btn,
1, );
That's OK. It's because ScrollPane::content is of a type DisplayObject. DisplayObject does not contain property named scrollpaneBckgrnd. MovieClip, however, is a dynamic class and enables you to (try to) access virtually any property you can imagine. If it doesn't exist in your particular instance of a MovieClip, you'll get an runtime error.
P.S. If you have time can you briefly tell me why is there  a line of code
in your sample:
mc_pane2.update();
ScrollPane::update() measures your content and sets scrollbars accordingly, if needed.
Can it be changed with the size specified for the mc_pane2:
mc_pane2.setSize(556, 300);
what would be the major difference between them?
They definitelly don't do the same. ScrollPane::setSize() sets size of your scrollpane If you get same results using one or the other function, it's because your content is smaller than 556x300px and you don't need scrollbars so in this particular case ScrollPane::update() would "do nothing".