Yes. As a simple and brief example - If you have a textbox defined
with the name "htmlTextBox", then you can access that server side the
same way you would in classic asp.
<input type="text" name="htmlTextBox" value="fred" />
Request("htmlTextBox")
I generally find it easier to include runat="server" in the html
definition and then just access the controls like I would any other
serverside control.
<input type="text" runat="server" id="htmlTextBox" value="fred" />
Then in code you would define the variable like so.
Dim htmlTextBox As System.Web.UI.HtmlControls.HtmlInputText
But its up to you and your own preference.
Hope this was helpful.