how can i get windows7 snap feature for xp?

As you said that you are using windows XP operating system on your computer system and you want to transform the user interface like Windows 7 operating system Aero feature, so I want to tell you that there are various kinds of transformation packs available on the internet, but the most popular is Windows Blind software from Microsoft Inc, it is a very interesting transformation pack its provides you various kinds of themes and graphics for the computer system with intelligent user interface and lots more, you just need to download the software from the Microsoft website or and third party software website like brothersoft.com, download.com etc. its trail version is free of cost for 90 days and the full version is on paid basis. You can download this for the Windows XP operating system and you can feel the Windows 7 experience on your XP computer.