用 GetComputerName来获取用户名时，如果处理不好，中文的计算机名则只会显示部分，该计算机名以ASCII码为0的字符结尾。所以我们要去掉这个字符。

Option Explicit

Private Const MAX_COMPUTERNAME_LENGTH As Long = 31
Private Declare Function GetComputerName Lib "kernel32" Alias "GetComputerNameA" (ByVal lpBuffer As String, nSize As Long) As Long

'*************************************************************************
'**函 数 名：GetPCName
'**输    入：无
'**输    出：(String) -
'**功能描述：获取计算机名
'**作    者：龙轩
'**日    期：2011-08-15
'**版    本：V1.0.0
'*************************************************************************
Public Function GetPCName() As String

    Dim dwLen As Long
    Dim strString As String
    Dim strName() As String
    
    'Create a buffer (缓冲区)
    dwLen = MAX_COMPUTERNAME_LENGTH + 1
    strString = String(dwLen, "X")
    'Get the computer name
    GetComputerName strString, dwLen
    'get only the actual data
    strString = Left(strString, dwLen)
    'Show the computer name
    strName = Split(strString, Chr(0))      '由于机器名为汉字时会出错，这里用chr(0)截取一下
    GetPCName = strName(0)
    
End Function

Private Sub cmdGetPCName_Click()
    '获取计算机名
    MsgBox GetPCName
End Sub

 效果：