MS Access on 32 vs  64 bit and VBA7

I have this part of code to make my Access 2003 32 bit application to work on 64 bit and MS access 2010.

Option Explicit


#If Win64 Then
 
    Declare PtrSafe Function apiGetUserName Lib "advapi32.dll" Alias "GetUserNameA" (ByVal lpBuffer As String, nSize As LongLong) As LongLong
#Else
 
    Declare Function apiGetUserName Lib "advapi32.dll" Alias "GetUserNameA" (ByVal lpBuffer As String, nSize As Long) As Long
#End If

#If VBA7 Then
 
    Private Declare PtrSafe Function apiGetUserName Lib "advapi32.dll" Alias "GetUserNameA" (ByVal lpBuffer As String, nSize As Long) As Long
#Else
 
    Private Declare Function apiGetUserName Lib "advapi32.dll" Alias "GetUserNameA" (ByVal lpBuffer As String, nSize As Long) As Long
#End If


I am getting error in part :

#If VBA7 Then
 
    Private Declare PtrSafe Function apiGetUserName Lib "advapi32.dll" Alias "GetUserNameA" (ByVal lpBuffer As String, nSize As Long) As Long <<< error line.
Error :Compile Error:
Ambiguous name detected apiGetUserName

How to get rid of this and get this function work in 32 and 64 as on new and old Access.?