Cheat Engine

[RAIN MAN]

how can i lock my applications that i make in C# to work for only the people i choose its halo 2 vista application...

[qHF]

Make them enter a password before it does anything
And only let those people know the password

[hcavolsdsadgadsg]

[NoMercy]

use a HWID Check and pack with themida

[Slugsnack]

a common method is to generate some sort of unique ID based on their computer's characteristics. this could include hardware, OS, username, etc. etc.

you then create some sort of algorithm which can map this ID to a serial. in this way that serial should only work on that computer. that is a common method. there are a lot of ways around this though. even before you consider people modifying your code, you would have to consider people spoofing those components you use in your ID generation.

another method is to use this and couple it with some form of server authentication. this way you could even check IP or log how many times/places a certain ID is being used from. this can be incorporated to be quite a powerful protection if you make it so parts of your application has to be fetched dynamically at runtime from the server

if you are coding c#, then first step is of course to use an obfuscater though. else you can consider yourself just giving out a free application already

[NINTENDO]

server sided login that blocks you if you type in wrong password many times

[Pingo]

Unique PCID Gen Source
Get them to run this app first to generate the code. They'l give you the code. Add the source of this app to your trainer and have it run on form load.
Make your allowed list within your trainer using the generated codes from your friends.

If the pc isnt in the allowed list, have the app close.
Generates a unique pcid using the static cpu and hdd serial.

[Jesper]

Have a server remotely check the clients HWID and if it's correct send the data the client needs to function properly.

[RAIN MAN]

Wow Thank you guys so much ! finally i get some programming help. i have been searching forever for this i dont like handing out applications that can be leaked you guys are awesome . ! now i know where i need to come to when i need some programming tips im very new to it.

[NINTENDO]

[Reak]

I wrote something like this a long time ago. (In delphi though)
It's like this:
The opcodes of the function are stored on a server.
Client Starts and sets the pointer of this function to a function that pops a message like "haha" or so.
A button click will send a generated hwid via http-get (idHTTP) to a php file which will compare it with a mysql-table and if the hwid is allowed the php script will prints out the opcodes of the function and will I recvice them via HTTP.
then allocate memory -> write recviced buf on it -> link the function to the written memory...
Worked fine

Just realised my english became even worse... =

[Pingo]

[tanjiajun_34]

Try packing with Winlicense.
Make use of its hardware locks.

[Slugsnack]

[tombana]