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MS Access on 32 vs  64 bit and VBA7

Posted on 2016-08-17
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Last Modified: 2016-08-18
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.?
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Question by:Taras
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Accepted Solution

by:
Jim Dettman (Microsoft MVP/ EE MVE) earned 350 total points
ID: 41760098
<<How to get rid of this and get this function work in 32 and 64 as on new and old Access.?>>

#If Win64  tells you if Office is running in 32 bit or 64 bit mode.

#If VBA7 tells you if your running Office 2010 or higher (32 or 64 bit).

From:

https://msdn.microsoft.com/en-us/library/ee691831(office.14).aspx#odc_office2010_Compatibility32bit64bit_Comparing32BitSystemsto64BitSystems

"As stated earlier, there are two new conditional compilation constants: VBA7 and Win64. To ensure backward compatibility with previous versions of Microsoft Office, you use the VBA7 constant (this is the more typical case) to prevent 64-bit code from being used in the earlier version of Microsoft Office. For code that is different between the 32-bit version and the 64-bit version, such as calling a math API which uses LongLong for its 64-bit version and Long for its 32-bit version, you use the Win64 constant. The following code demonstrates the use of these two constants."

 So in this case, unless that call is different between 32 and 64 bit, then it should not be in the Win64 section.

Here's a list of all the calls that were modified for 64 bit:
http://msdn.microsoft.com/en-us/library/aa383663(VS.85).aspx

also:

http://www.microsoft.com/download/en/confirmation.aspx?displaylang=en&id=9970

Jim.
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LVL 27

Assisted Solution

by:MacroShadow
MacroShadow earned 150 total points
ID: 41760189
Your problem has nothing to do with conditional compilation.
The problem is that you named the module  with this code apiGetUserName.
0
 
LVL 57
ID: 41760205
<<Your problem has nothing to do with conditional compilation.>>

  He's got the same call declared twice and right now, he's running 64 bit in 2010 or higher, so both constants are true.

Jim.
1
 

Author Closing Comment

by:Taras
ID: 41761127
Thank you a lot.
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