public static extern UInt32 FilterInstanceFindNext( IntPtr hFilterInstanceFind, FltUserStructures._INSTANCE_INFORMATION_CLASS dwInformationClass, IntPtr lpBuffer, UInt32 dwBufferSize, ref UInt32 lpBytesReturned );
public static extern UInt32 FilterInstanceFindFirst( String lpFilterName, FltUserStructures._INSTANCE_INFORMATION_CLASS dwInformationClass, IntPtr lpBuffer, UInt32 dwBufferSize, ref UInt32 lpBytesReturned, ref IntPtr lpFilterInstanceFind );