How to: Specify Multiline Input for a TextBox Web Server Control
A multiline TextBox control allows users to type information into a box that supports wordwrapping and vertical and horizontal scrolling.
To create a multiline TextBox Web server control
Set the size of the control by setting the following properties:
Setting these properties does not limit the number of characters or rows the user can enter, only how many are displayed. The control always displays a vertical scrollbar. Height and Width take precedence over Rows and Columns.
By default, a multiline TextBox control includes a vertical scroll bar. To hide the scroll bar, include the style attribute overflow: hidden. For example, in HTML view, the declarative syntax for the control might look as follows:
<asp:TextBox id="TextBox1" style="Z-INDEX: 101; LEFT: 56px; OVERFLOW: hidden; POSITION: absolute; TOP: 72px" runat="server" TextMode="MultiLine"></asp:TextBox>
Set word-wrap behavior by setting the control's Wrap property. If true, text wraps automatically (without embedding carriage-return/line feed characters). If false, the text does not wrap and the user must press ENTER to start a new line, which embeds a carriage-return/line feed character. Setting the Wrap property to false causes the control to display a horizontal scroll bar.
The MaxLength property has no effect in a multiline text box.