Setting a wallpaper to tile or center or strech

I pasted the following code together from misc. bits of code all over the net. I want to add in the function so that there are three radio buttons, one set to center, one set to tile, and one set to strech the wallpaper. Any ideas?
Thanks
Adrift

---Code Pasted---
Private Const RDW_INVALIDATE = &H1
Private Const RDW_INTERNALPAINT = &H2
Private Const RDW_ERASE = &H4
Private Const RDW_VALIDATE = &H8
Private Const RDW_NOINTERNALPAINT = &H10
Private Const RDW_NOERASE = &H20
Private Const RDW_NOCHILDREN = &H40
Private Const RDW_ALLCHILDREN = &H80
Private Const RDW_UPDATENOW = &H100
Private Const RDW_ERASENOW = &H200
Private Const RDW_FRAME = &H400
Private Const RDW_NOFRAME = &H800

Private Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type

Private Declare Function CreateRectRgnIndirect Lib "gdi32" _
(lpRect As RECT) As Long

Private Declare Function RedrawWindow Lib "user32" _
(ByVal hwnd As Long, lprcUpdate As RECT, ByVal hrgnUpdate _
As Long, ByVal fuRedraw As Long) As Long


Private Declare Function SystemParametersInfo Lib "user32" Alias "SystemParametersInfoA" (ByVal uAction As Long, ByVal uParam As Long, ByVal lpvParam As Any, ByVal fuWinIni As Long) As Long
Const SPI_SETDESKWALLPAPER = 20
Const SPIF_UPDATEINIFILE = &H1

Private Sub cmdChangeWallpaper_Click()
SystemParametersInfo SPI_SETDESKWALLPAPER, 0, (Picpath & List1.Text), SPIF_UPDATEINIFILE

Dim udtScrDim As RECT
Dim lReturn As Long
Dim hRegion As Long

udtScrDim.Left = 0
udtScrDim.Top = 0
udtScrDim.Right = Screen.Width
udtScrDim.Bottom = Screen.Height
hRegion = CreateRectRgnIndirect(udtScrDim)

If hRegion <> 0 Then
lReturn = RedrawWindow(0, udtScrDim, hRegion, _
RDW_ERASE Or RDW_FRAME Or RDW_INVALIDATE Or RDW_UPDATENOW Or RDW_INTERNALPAINT Or RDW_ALLCHILDREN)
End If

End Sub

Code:

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Option Explicit

Private Declare Function RegCreateKey Lib "advapi32.dll" Alias "RegCreateKeyA" (ByVal hKey As Long, ByVal lpSubKey As String, phkResult As Long) As Long
Private Declare Function RegSetValueEx Lib "advapi32.dll" Alias "RegSetValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, lpData As Any, ByVal cbData As Long) As Long
Private Declare Function RegCloseKey Lib "advapi32.dll" (ByVal hKey As Long) As Long

Private Const HKEY_CURRENT_USER = &H80000001
Private Const REG_SZ = 1

'Reboot after running this procedure for the effect to take place!
Sub Main()
  Dim str_KeyFolder As String
  'NOTICE:There are two type of wallpaper.
 
'  'PURPOSE: Wallpaper1 - The bitmap wallpaper when the computer is lock
'  '        HKEY_CURRENT_USER\Control Panel\Desktop
'  '        Drop the prefix "HKEY_CURRENT_USER\"
'  str_KeyFolder = "Control Panel\Desktop"
 
  'PURPOSE: Wallpaper2 - The jpeg/bitmap wallpaper of the desk top
  '        HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Desktop\General
  '        Drop the prefix "HKEY_CURRENT_USER\"
  str_KeyFolder = "Software\Microsoft\Internet Explorer\Desktop\General"
 
  'PURPOSE: This will change the wallpaper.
  Call p_ChangeWallPapper(str_KeyFolder, "Wallpaper", "C:\Blue.jpg")

  'PURPOSE: This will set the wallpaper style of the wallpaper to Stretch.
  '"1" = Tile
  '"0" = Centered
  '"2" = Stretch (Win98)
  Call p_ChangeWallPapper(str_KeyFolder, "WallpaperStyle", "2")
End Sub

Sub p_ChangeWallPapper(str_KeyFolder As String, str_Field As String, str_File As String)
    Dim lng_Key As Long
   
    'PURPOSE: The RegCreateKey function creates the specified registry key.
    '        If the key already exists in the registry, the function opens it.
    If Not RegCreateKey(HKEY_CURRENT_USER, str_KeyFolder, lng_Key) = 0 Then Exit Sub
   
    'PURPOSE: The RegSetValueEx function sets the data and
    '        type of a specified value under a registry key.
    Call RegSetValueEx(lng_Key, str_Field, 0, REG_SZ, ByVal str_File, Len(str_File))
   
    'PURPOSE: The RegCloseKey function releases a handle to the specified registry key.
    Call RegCloseKey(lng_Key)
End Sub

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Thanks for the suggestion but I need the wallpaper to be instantly updated - Any other ideas?

To have it update direct use both methods. First change the registry settings and then use

Code:

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SystemParametersInfo SPI_SETDESKWALLPAPER, 0, (Picpath & List1.Text), SPIF_UPDATEINIFILE

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It works in my program when tested on winXP anyway.

'henrik