GetUserName与GetUserNameA的关系

酱爆

[pre lang="VB.net" line="1"]Public Class Form1
    Public Declare Function GetUserNameA Lib "advapi32.dll" (ByVal lpBuffer As String, ByRef nSize As Integer) As Integer
    Dim iReturn As Integer
    Dim userName As String

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        
        userName = Space(100)
        iReturn = GetUserNameA(userName, 50)
        Label1.Text = userName
    End Sub
End Class[/pre]
如果把[pre lang="VB.net" line="1"]Public Declare Function GetUserNameA Lib "advapi32.dll" (ByVal lpBuffer As String, ByRef nSize As Integer) As Integer[/pre]改为[pre lang="VB.net" line="1"]Public Declare Function GetUserName Lib "advapi32.dll" (ByVal lpBuffer As String, ByRef nSize As Integer) As Integer[/pre]却不能获取当前登陆用户的名称，而且不报错。

凌童鞋

一般来说，带A的是ANSI编码的版本……

orzfly

话说 vb.net 里面根本不需要 api 吧。请相信这是 vb.net，运行库提供了 System.Environment.UserName 这个