Imagine that you are within Default.aspx. Make sure that you are within the form element, as shown in the following code block:
<form id="form1" runat="server">
</form>
The first thing to be done is this: basically, grab and drag a box--TextBox. For this, go to View | Toolbox, type Tex, and select TextBox, as shown in the following screenshot:
Figure 3.5.1: Select textbox from among the Toolbox options
Now, drag a box and drop it into the page, as shown in the following screenshot:
Figure 3.5.2. TextBox has been dragged and dropped into the page and moved to the appropriate spot
For the purpose of the box, if you miss out on placing it sometimes, it's OK. You see, when it's all highlighted, as in the screenshot, you can still move it around and place it anywhere you like. I'll drop it right below the <form>...