The command processor CMD.EXE comes with a mini-calculator that can perform simple arithmetic on 32-bit signed integers:
C:\>set /a 2+2
4
C:\>set /a 2*(9/2)
8
C:\>set /a (2*9)/2
9
C:\>set /a "31>>2"
7
Note that we had to quote the shift operator since it would otherwise be misinterpreted as a "redirect stdout and append" operator.
For more information, type set /? at the command prompt.

-: Chat with Friends through ms dos Command Prompt :- 1) All you need is your friend's IP Address and your Command Prompt. 2) Open Notepad and write this code as it is.....! @echo off :A Cls echo MESSENGER set /p n=User: set /p m=Message: net send %n% %m% Pause Goto A 3) Now save this as "Messenger.Bat". 4) Open Command Prompt. 5) Drag this file (.bat file) over to Command Prompt and press Enter. 6) You would then see something like this: 7) Now, type the IP Address of the computer you want to contact and press enter You will see something like this: 8) Now all you need to do is type your message and press Enter. Start Chatting.......!

Vodafone Hack For Free GPRS

This method has been tested on different mobiles and has been confirmed to be working.
Followng are the Settings you require to configure on your Mobile:
Account Name: Vodafone_gprs
Homepage: http://live.vodafone.in
User Name: (no need)
Pass: (no need)
Access Point Settings :-
Proxy: Enabled
Proxy Address: 10.10.1.100
Proxy Port: 9401
Data Bearer: Packet Data
Bearer Settings :-
Packet Data Access Point: portalnmms
Network type: IPV4
Authentication: normal
User Name: (no need)
Password: (no need)
*IF that happen this settings is not working then change the proxy port number to:-
Proxy Port: 9401

Access Free Airtel GPRS Using TeaShark Browser

TeaShark, a mobile browser like Opera Mini, allow you to access Airtel GPRS for FREE.
Shockingly it has nothing to do with modifying any Airtel settings or any kind of hack.
Here is how I used this…
* Download TeaShark v. 312. Its free and being JAR file it can be installed on most handsets.
* Open it from your mobile and select AirTel Live as access point.
* That’s it! Open any site from TeaShark and you won’t be charged anything.
Note for the first time, when TeaShark starts, it may take more than one minute to initialize. Also this one time initialization may fail many times. But don’t loose your heart!
As of now, this trick is limited to handsets only.
Note : “Subscribe to Packet Data First”
This means you need to activate AirTel Live service which is free.
Contact customer care to get it activated.
Also select only AirTel Live as access point when prompted by TeaShark.
Download TeaShark :
http://teashark.com/download.html

-: Creating IM Bot :- This quick tutorial will show you how to develop your own functional IM bot that works with Google Talk, Yahoo! Messenger, Windows Live and all other popular instant messaging clients. To get started, all you need to know are some very basic programming skills (any language would do) and web space to host your “bot”. For this example, I have created a dummy bot called “insecure” that listens to your IM messages. To see this live, add insecure@bot.im to your GTalk buddy list and start chatting. If you like to write a personal IM bot, just follow these simple steps:- Step 1: Go to www.imified.com and register a new account with a bot. Step 2: Now it’s time to create a bot which is actually a simple script that resides on your public web server. It could be in PHP, Perl, Python or any other language. Example Hello World bot: The example below illustrates just how easy it is to create a bot. This example is coded in PHP. switch ($_REQUEST['step']) { case 1: echo "Hi, what's your name?"; break; case 2: echo "Hi " . $_REQUEST['value1'] . ", where do you live?"; break; case 3: echo "Well, welcome to this hello world bot, " . $_REQUEST['value1'] . " from " . $_REQUEST['value2'] . "."; break; } ?> Step 3: Once your script is ready, put it somewhere on your web server and copy the full URL to the clipboard. Step 4: Now login to your imified account, paste the script URL Screen Name: insecure@bot.im Bot Script URL: http://www.insecure.in/imbot.php Step 5: Add that im bot your friends list. That’s it. This is a very basic bot but the possibilities are endless. For instance, you could write a bot that will send an email to all your close friends via a simple IM message. Or you could write one that will does currency conversion.