There are two kinds of text objects - type blocks and text fields. There are many ways to distinguish between the two. Type blocks in Flash are static text, and are referred to as type, not text. Type does not have the ability to be set dynamically. To create a block of type, press the Text tool button and click on the stage.
Text fields are text containers in Flash that can hold variable data.
They can be used to enter data or to create a form. They can also be set dynamically using actions and variables. To create a text field, press the Text tool button and also the Text Field modifier button on the bottom of the toolbar. The resulting box has a handle in the lower right hand corner. Unlike a type block, a text field will still display a slight border in the editor, even if the text field contains no text.