I'm curious if it is possible to have recursive classes in VB, and If
so how.  I'm use to C/C++ where you simply declare a pointer to the
same type as itself.

As an example I was thing of coming up with classes for a hard
drive.

Drive
  |
  +-- Directories
       |   |
       |   |
       |   +--- Directories
       |           |   |
       +-- Files   |   |
                   |   +--- Directories
                   |
                   +-- Files

Other then being a good example for learning I probably wouldn't use
this for any thing else...

Thanks in advance.

Dano :)

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You would not need 1st order recursion for your example.
You would have one instance of 2nd order recursion.

You would have a class for drive, folder and file and collection classes for
drives, folders and files.

Drives contains a collection of Drive
Drive contains a Folders property
Folders contains a collection of Folder
Folder contains a Folders property and a Files property
Files contains a collection of File
File contains the data about a file

Regards,
Simon Jones
PC Pro Magazine

Thanks for the reply.  I like the abstraction you have for the drive,
dir and file.  While I'm actually interested in using a recursive data
type.  I was using the drive, directory, and files as an example for a
data type which may be recursive.  Say if I change to a data type which
is often easier to represent/process as a recursive data type such as a
linked list or other tree structures?  My main interest is to learn how
to do a recursive data type in VB and go through the issues of what it
takes and how to process them in VB.

Thanks again for you input and have a GREAT Day.

Dano :)

Dan Doris

www.logoscomputer.com
3801 14th. Ave. W.
Seattle, WA  98119

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Any one interested in this  I found an example for this a linklist in
the Advance Visual Basic Book from Microsoft Press. The book is a bright
orange color.