' For each control in this form
                For Each loControl In loHtmlForm.Controls

                    ' If this is a textbox
                    If loControl.GetType().ToString = "System.Web.UI.WebControls.TextBox" Then

                        ' Assign this control to a textbox variable
                        loTextbox = loControl

                        ' Add the onkeypress to the textbox
                        loTextbox.Attributes.Add("onkeypress", "FormKeyPress(event)")

                    End If

                Next