<!DOCTYPE html>
<html>
<body>

<form runat="server">

A basic TextBox:
<asp:TextBox id="tb1" runat="server" />
 

A password TextBox:
<asp:TextBox id="tb2" TextMode="password" runat="server" />
 

A TextBox with text:
<asp:TextBox id="tb3" Text="Hello World!" runat="server" />
 

A multiline TextBox:
<asp:TextBox id="tb4" TextMode="multiline" runat="server" />
 

A TextBox with height:
<asp:TextBox id="tb5" rows="5" TextMode="multiline" runat="server" />
 

A TextBox with width:
<asp:TextBox id="tb6" columns="30" runat="server" />

</form>

</body>
</html>