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Function for returning the computer name using VBA in Microsoft Excel

VBA macro tip contributed by Erlandsen Data Consulting offering Microsoft Excel Application development, template customization, support and training solutions



The function below will return the computer name for the machine running the code,
works in both Windows NT and Windows95/98. 
Private Declare Function GetComputerName Lib "kernel32" _
    Alias "GetComputerNameA" _
    (ByVal lpBuffer As String, nSize As Long) As Long


Function ReturnComputerName() As String
Dim rString As String * 255, sLen As Long, tString As String
    tString = ""
    On Error Resume Next
    sLen = GetComputerName(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
    ReturnComputerName = UCase(Trim(tString))
End Function