Dos subclassing

[aurelcly]

Good afternoon Please I want to subclassing dos commands but I don,t know how can I proceed.

[David Crow]

aurelcly wrote:

subclassing dos commands

:confused:

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[Maximilien]

huh?

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[Lost User]

aurelcly wrote:

I want to subclassing dos commands

Not possible I'm afraid.

MVP 2010 - are they mad?

[Code o mat]

Try to explain what you mean, as you can see we don't quite get what you mean. Do you maybe mean you want to replace dos commands with your own versions, like, writing your own terminal or such?

> The problem with computers is that they do what you tell them to do and not what you want them to do. < > Sometimes you just have to hate coding to do it well. <

[Avi Berger]

Are you actually dealing with a genuine DOS environment or are you talking about a Windows console? I don't know the low level details of the Windows console, but I would not assume that they are the same. Things that you might mean, but we can't tell which, if any: 1) Hook a DOS call. (presumably some int 21h function) 2) Replace an "external" DOS command. (provide a replacement executable earlier on the path) 3) Replace an "internal" DOS command. (I don't think this is going to happen without replacing the command interpreter, but perhaps I'm wrong.)

[loyal ginger]

Right! INT 21H and such. Sounds quite distant. I guess he is not interested in that type of things. He probably wants to mess with the Windows Console.

[Avi Berger]

loyal ginger wrote:

I guess he is not interested in that type of things. He probably wants to mess with the Windows Console.

I'd presume so as well. It's not quite so distant for me though. I do some maintenance on an embedded system that uses a board support package that is a partial DOS work alike. I've had to reverse engineer part of its INT 21H implementation to find and patch some bugs in it.