Paint Event - Rotating Text Of Label

The task is to rotate the text of a label in the web form by a certain degree. The label is present in a cell of a table. I tried functions like these (after googling) but error says PaintEventArgs/System.Windows.Forms.PaintEventArgs is not defined. Public Class Form1

Private Sub Form1_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles Me.Paint
e.Graphics.DrawString("Hello World", _
Brushes.Black, _
10, _
10, _
New StringFormat(StringFormatFlags.DirectionVertical))
End Sub End Class
Private Sub Form1_Paint( _
ByVal sender As Object, _
ByVal e As System.Windows.Forms.PaintEventArgs _
) Handles MyBase.Paint
e.Graphics.RotateTransform(20)
e.Graphics.DrawString("Hello World!", Me.Font, Brushes.Blue, 0, 0)
End Sub

I have tried importing the below classes... but to no avail..

Imports System.Data
Imports System.Drawing
Imports System.Drawing.Text
Imports System.Drawing.Graphic

What am I missing? (Possibly I am not getting the equivalent class of PaintEventArgs in webform...) (Am using Visual Studio 2008)