Hi people

I am trying to allow the user to launch the Windows Screen Saver by clicking on a button. I have the following code:
Code:
Option Explicit On

      
Public Class Form1
    Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
    Const WM_SYSCOMMAND = &H112&
    Const SC_SCREENSAVE = &HF140&

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        SendMessage(Me.hwnd, WM_SYSCOMMAND, SC_SCREENSAVE, 0&)
    End Sub
End Class
But get the error:
Error 1 'hwnd' is not a member of 'LaunchScreensaverTest.Form1'.
any ideas why?

Thanks