Function for returning the user name using VBA in Microsoft Excel

The function below will return the user name for the logged on user, works in both Windows NT and Windows95/98.

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

Function ReturnUserName() As String
' returns the NT Domain User Name
Dim rString As String * 255, sLen As Long, tString As String
    tString = ""
    On Error Resume Next
    sLen = GetUserName(rString, 255)
    sLen = InStr(1, rString, Chr(0))
    If sLen > 0 Then
        tString = Left(rString, sLen - 1)
    Else
        tString = rString
    End If
    On Error GoTo 0
    ReturnUserName = UCase(Trim(tString))
End Function

If you don't want to return the network user name,
but want to return the user name that the user has registered with the application you can do this:

ActiveUserName = Application.UserName

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