Sometimes, you may feel the need to only select a part of an object; and not the object as a whole. In such cases, you use the Lasso Tool. This is basically a free hand selection tool. Just trace the what you want to select using your mouse, and to close the selection" just double-click your mouse on the point you started the selection. If you don't reach the point of origin, Flash will close the selection with a straight line from where you are to the point of origin when you double-elick.
You can also use the Magic Wand Tool and the Polygonal Lasso Tool. The Magic Wand is used to select an object on the basis of their fill colour.

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If you click on a particular colour in an object with the Magic Wand Tool, all other areas with the same colour will be selected. You can tweak the Magic Wand settings to define the Threshold of selection. If you set a big Threshold value, then the colours that almost match your choice colour will also be selected. Another selection Tool is the Polygonal Lasso Tool. Here, unlike the Lasso Tool, you don't need to press the mouse while dragging. You can just click once to define the edges. To complete the selection process you have to double-click. The shortcut for this is [L] .