Changer l icone d excel pour

Bonjour,

SVP j essaie de changer l icone d excel et je met ce code :

Option Explicit

Declare Function FindWindow Lib "user32" Alias "FindWindowA" _
(ByVal lpClassName As String, ByVal lpWindowName As String) As Long

Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
(ByVal hWnd As Long, ByVal wMsg As Long, _
ByVal wParam As Long, lParam As Any) As Long

Declare Function DrawMenuBar Lib "user32" (ByVal hWnd As Long) As Long

Const WM_SETICON = &H80
Const ICON_SMALL = 0
Const ICON_BIG = 1

Sub ChangeXLIcon(Optional ByVal hIcon As Long = 0&)
'code original de Jim Rech
    Dim hWnd As Long
    Dim lngRet As Long
    hWnd = FindWindow("XLMAIN", Application.Caption)
    lngRet = SendMessage(hWnd, WM_SETICON, ICON_SMALL, ByVal hIcon)
    lngRet = SendMessage(hWnd, WM_SETICON, ICON_BIG, ByVal hIcon)
    lngRet = DrawMenuBar(hWnd)
End Sub

sauf que ca ne marche pas il me demande de mettre a jour a 64 bits mon code surtout cette portion et franchement je ne sais pas comment je vais pouvoir le faire

Declare Function FindWindow Lib "user32" Alias "FindWindowA" _
(ByVal lpClassName As String, ByVal lpWindowName As String) As Long

Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
(ByVal hWnd As Long, ByVal wMsg As Long, _
ByVal wParam As Long, lParam As Any) As Long

Declare Function DrawMenuBar Lib "user32" (ByVal hWnd As Long) As Long

merci d avance de votre aide

gros bravo