I have this in VFP:

DECLARE INTEGER InternetWriteFile IN WinINet.dll ;
  INTEGER nFile, STRING cBuffer, ;
  INTEGER nToWrite, INTEGER @ nWritten

This is as close as it gets in VB.NET:

        Private Declare Function InternetWriteFile Lib "WinINet.dll" _
         (ByVal nFile As Integer, ByVal cBuffer As String, _
          ByVal nToWrite As Integer, ByVal @ nWritten As Integer) As Integer

The problem is the @ character. What would be required to complete this conversion in VB.NET?