The code with API functions below is working perfectly almost on all
computers  but on a few ones is not working.
What could be the cause of this?
Thanks
.....
Private Declare Function apiNetGetDCName _
   Lib "netapi32.dll" Alias "NetGetDCName" _
   (ByVal servername As Long, _
   ByVal DomainName As Long, _
   bufptr As Long) As Long

' function frees the memory that the NetApiBufferAllocate
' function allocates.
Private Declare Function apiNetAPIBufferFree _
   Lib "netapi32.dll" Alias "NetApiBufferFree" _
   (ByVal buffer As Long) _
   As Long

' Retrieves the length of the specified wide string.
Private Declare Function apilstrlenW _
   Lib "kernel32" Alias "lstrlenW" _
   (ByVal lpString As Long) _
   As Long

Private Declare Function apiNetUserGetInfo _
   Lib "netapi32.dll" Alias "NetUserGetInfo" _
   (servername As Any, _
   UserName As Any, _
   ByVal level As Long, _
   bufptr As Long) As Long

' moves memory either forward or backward, aligned or unaligned,
' in 4-byte blocks, followed by any remaining bytes
Private Declare Sub sapiCopyMem _
   Lib "kernel32" Alias "RtlMoveMemory" _
   (Destination As Any, _
   Source As Any, _
   ByVal Length As Long)

Private Declare Function apiGetUserName Lib _
   "advapi32.dll" Alias "GetUserNameA" _
   (ByVal lpBuffer As String, _
   nSize As Long) _
   As Long

Private Const MAXCOMMENTSZ = 256
Private Const NERR_SUCCESS = 0
Private Const ERROR_MORE_DATA = 234&
Private Const MAX_CHUNK = 25
Private Const ERROR_SUCCESS = 0&
....