Activating, encyrpting software etc.

[Guest]

Hi,
I am working on some software on vb.net that I am looking to sell over
the internet, I believe a demo version would be best.

I would like to sell activation keys,
which unlock the program from demo mode, into full-mode. I believe this
involves a little bit of cryptography and I'm sure .NET has lots of
high-level frameworks for
doing exactly what I need, can anybody direct me to getting started in this
area.
Thanks for any help.
Barry.

 

[One Handed Man \( OHM - Terry Burns \)]

I have an application which is writing to a graphics object, the main UI
thread and a worker thread are writing to the same object, how to I manage
this to I dont get an exception ?

Thanks OHM

--
OHM ( Terry Burns ) * Use the following to email me *

Dim ch() As Char = "ufssz/cvsotAhsfbuTpmvujpotXjui/OFU".ToCharArray()
For i As Int32 = 0 To ch.Length - 1
ch(i) = Convert.ToChar(Convert.ToInt16(ch(i)) - 1)
Next
Process.Start("mailto:" & New String(ch))

 

[scorpion53061]

http://msdn.microsoft.com/msdnmag/issues/01/07/vbnet/default.aspx

 

[Larry Serflaten]

I have an application which is writing to a graphics object, the main UI
thread and a worker thread are writing to the same object, how to I manage
this to I dont get an exception ?

Use a delegate. Do the actual drawing from a routine in your form, but call it
from that worker thread using the form's Invoke method.

Unless this is just an exercise on using threads, I'd have to wonder why you've
decided to use a thread for your invaders. If the screen has 30-40 invaders, you'd
end up with 30-40 threads at the start of a level. I'd think that to be an excessive
drain on the system, as each thread has a considerable amount of processing overhead.

Have fun!
LFS

 

[Ken Tucker [MVP]]

Hi,

http://windowsforms.net/articles/Licensing.aspx

Ken
---------------------
Hi,
I am working on some software on vb.net that I am looking to sell over
the internet, I believe a demo version would be best.

I would like to sell activation keys,
which unlock the program from demo mode, into full-mode. I believe this
involves a little bit of cryptography and I'm sure .NET has lots of
high-level frameworks for
doing exactly what I need, can anybody direct me to getting started in this
area.
Thanks for any help.
Barry.

 

[Bob Hollness]

Try this. It is free

http://www.aspose.com/Products/Aspose.License/


Bob

 

[Guest]

Thanks Bob and Ken, have had a quick look at both the links you guys have
said and it looks like the kind of stuff I need, much appreciated.

 

[Guest]

Hi,
I have been looking in particular at ken tucker's link, as ever in trying
to figure out new stuff things are tricky, I am gathering though that this
article is to do with components, I just want to licence an application not
individual components, in fact i have not created any components of my own so
it doesn't appear to be relevant to me. Is there a way of licensing an
application. Maybe I'm missing something but can't seem to get this info
anywhere.
Regards,
barry.