vb.net read and write .ini files

Private Declare Auto Function GetPrivateProfileString Lib "Kernel32" _
        (ByVal lpAppName As String, ByVal lpKeyName As String, ByVal lpDefault As String, ByVal lpReturnedString As StringBuilder, ByVal nSize As Integer, ByVal lpFileName As String) As Integer

Private Declare Auto Function WritePrivateProfileString Lib "Kernel32" _
        (ByVal lpAppName As String, ByVal lpKeyName As String, ByVal lpString As String, ByVal lpFileName As String) As Integer