Hi AtomSoft.

You might wanna check out the WriteProfile and GetProfile API's.
They will work just as well in VB .NET.

VB Code:
  1. Private Declare Function WritePrivateProfileString Lib "kernel32" Alias "WritePrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As Object, ByVal lpString As Object, ByVal lpFileName As String) As Integer

  2.  
  3. Private Declare Function GetPrivateProfileString Lib "kernel32" Alias "GetPrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As Object, ByVal lpDefault As String, ByVal lpReturnedString As String, ByVal nSize As Integer, ByVal lpFileName As String) As Integer

I'm not sure the above declarations are 100% accurate, but it's definitly close

Hope it helps.