The lasso tool is in many other programs like photoshop, however, i am assuming you mean adobe flash creator. The lasso tool is a tool that can be used to separate obvious lines for selection, whether it be to copy the selection or delete it. It is designed to make selecting what you want much easier rather than taking a lot of time getting rid of what you want manually.
The lasso tools: "Lasso Tool,""Polygonal Lasso Tool,"and "Magnetic Lasso Tool." You can quickly switch between the 3 by using the "Shift L" keys on your keyboard.
magic wand tool, quick selection tool, lasso tool polygonal or magnetic lasso tool. there the main one's.
The lasso tool is one of the selection tools with a variety of options As well as the lasso tool select pixels the ones you go over with the tool and you can remove it or put it a different spot
Magnetic lasso makes selections, it snaps to edges automaticaly while you work with this tool.
Feathering
You can use the pen tool, quick selection tool and lasso.
We use Lasso tools (Lasso, Polygonal Lasso and Magnetic Lasso tool) to make selections. You can make new selection, add, subtract or intersect with existing selection using Lasso tools. For more details visit related links.
Lasso Tool for selections, Pen Tool, Pencil Tool, Brush for drawings and painting.
There are around 100 tools and features on Photoshop, and you will just keep finding more and more :)
what flash
It's a tool in editing programs that lets you select all of which is the same color. Kind of like a lasso tool, only easier.
For selections you can your the Marquee Tool, Lasso Tool, or Magic Wand Tool. To cut that selection you can use the Move Tool, or the Ctr-X keyboard shortcut.