VB.net GetPrivateProfileString WritePrivateProfileString 读写INI

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Private Declare Function GetPrivateProfileString Lib "kernel32" Alias "GetPrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As String, ByVal lpDefault As String, ByVal lpReturnedString As String, ByVal nSize As Int32, ByVal lpFileName As String) As Int32
Private Declare Function WritePrivateProfileString Lib "kernel32" Alias "WritePrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As String, ByVal lpString As String, ByVal lpFileName As String) As Int32

Private Function GetPreviousInfo(ByRef sPreActNumber As String, ByRef sPreUserName As String) As Boolean
Try

            Dim strPath As String
            strPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments).ToString
            sPreActNumber = Space(255)
            sPreUserName = Space(255)
            GetPrivateProfileString("SMS", "ActNumber", "", sPreActNumber, 128, strPath & iniFileName)
            GetPrivateProfileString("SMS", "UserName", "", sPreUserName, 128, strPath & iniFileName)

GetPreviousInfo = True

        Catch ex As Exception
            MessageBox.Show(ex.Message & vbCrLf & ex.StackTrace, "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Error)
            GetPreviousInfo = False

End Try

End Function

Private Function SaveDefaultValue() As Boolean

        Try
            Dim strPath As String
            strPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments).ToString
            Dim sPreActNumber As String
            Dim sPreUserName As String

sPreActNumber = Mid(Me.Cmb_AccountList.Text, 1, InStr(Me.Cmb_AccountList.Text, "|") - 2)
sPreUserName = Me.Txt_UserName.Text

Dim fs As System.IO.FileStream

            If System.IO.File.Exists(strPath & iniFileName) Then
                System.IO.File.Delete(strPath & iniFileName)
            End If
            fs = System.IO.File.Create(strPath & iniFileName)
            fs.Close()

WritePrivateProfileString("SMS", "ActNumber", sPreActNumber, strPath & iniFileName)
WritePrivateProfileString("SMS", "UserName", sPreUserName, strPath & iniFileName)

SaveDefaultValue = True

        Catch ex As Exception
            MessageBox.Show(ex.Message & vbCrLf & ex.StackTrace, "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Error)
            SaveDefaultValue = False

End Try
End Function