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.NET Forum / Languages / Managed C++ / October 2003

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Can someone point me in the right direction?

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John Osborne - 29 Oct 2003 05:18 GMT
   I'm a beginner at this programming thing (C# and VB/VB.Net) but I have
been given a task that I don't even knwo how to start to accomplish.

   I'm not asking anyone to write the code or anything, just to point me in
the right direction if you can.

   The situation is this...  My boss wants me to write a client that users
can use to connect to a machine on our network (we'll call this the host)
and view the host's screen as close to real time as possible.  He wants to
use the application as a teaching tool in-house and wants to write it
in-house so that there will be no problems with changing it around or
royalties or anything.

   I suggested something like VNC (it's free, right?), but he only wants a
client that shows the screen like VNC does.  He wants no other
functionality.  He also hates using other folks software - he's strange like
that.

   Any ideas on the type of calls (API or otherwise) I should be looking at
to detect and transmit the screen image in a near-real-time manner?

   Thanks for your help.

John Osborne
dnagel - 29 Oct 2003 06:53 GMT
You boss is wasting your time and his money.  Use VNC, it has a theatre
mode that only permits viewing...   VNC is a highly respected, well
written piece of code.  He could only dream of writing something in-
house that approaches it's stability and functionality, (no offense
meant to your capabilities or skill set, but ... I'm not wrong).  It has
thousands of man hours of design, coding, and testing.  Theres totally
NO reason to exhibit a prejudice to it just because he (his team) didn't
write it.

Do yourself a favor and get away from this guy before he rubs off on you.

Other that that, I wish you the best in everything you do my compadre...

D.
Fargo Holiday - 29 Oct 2003 07:08 GMT
>     I'm a beginner at this programming thing (C# and VB/VB.Net) but I have
> been given a task that I don't even knwo how to start to accomplish.
[quoted text clipped - 20 lines]
>
> John Osborne

Hmmm... you might look around sourceforge.net or freshmeat.net and either
look at the code on similar projects or ask the developers for advice.
dreamincode.net has some fairly active forums as well. I, personally, have
barely begun to bark up the win32 tree, so there isn't more than the vaugest
ideas in my head as to how to do what you need.

Best of luck!
K_Lee - 30 Oct 2003 09:03 GMT
> I'm a beginner at this programming thing (C# and VB/VB.Net) but I have
> been given a task that I don't even knwo how to start to accomplish.
[quoted text clipped - 20 lines]
>
> John Osborne

The VNC function traces for the your require functionalities looks
something like this:

http://www.slink-software.com/W/SrcDoc_Top/vnc-3.3.7/vnc-3.3.7-winsrc.sdoc/N_20

vnc-3.3.7-winsrc.sdoc
    FillDisplayInfo - vncserver.cpp:1083
        ClientUpdateTracker - vncclient.h:150
            SimpleUpdateTracker - rfbUpdateTracker.h:61
            add_changed - vncclient.h:158
                TriggerUpdateThread - vncclient.cpp:1100
                    vncClientUpdateThread - vncclient.cpp:60
                    Trigger - vncclient.cpp:1117
                        Trigger - vncclient.cpp:117
        ServerUpdateTracker - vncserver.h:237
            add_changed - vncserver.cpp:47
               
http://www.slink-software.com/W/SL_TopGetSL/vnc-3.3.7/vnc-3.3.7-winsrc.slk/ID_Si
mpleUpdateTracker/FILE_winvnc/winvnc/rfbUpdateTracker.cpp/L_50/LN_66#L_63


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