If for some reasons, you require the snapshot of the web page you are currently browsing, you may use the Print Screen function or the Windows Snipping Tool but you already know that you won’t be able to save the snapshot of the entire web page. You can only take the screenie of the window that is opened.
Here is a tool called SiteShoter that will help you with this purpose. SiteShoter is a small utility that allows you to save a screenshot of any Web page into a file. It automatically creates hidden window of Internet Explorer, loads the desired Web page, and then save the entire content of the Web page into an image file (.png, .jpg, .tiff, .bmp or .gif). You can also use SiteShoter to convert .html file on your local drive into image file.
You can use SiteShoter in user interface mode, or alternatively, you can run SiteShoter in command-line mode without displaying any user interface. This utility works on Windows XP, Window 2003 Server, Window 2008 Server, Windows Vista, and Windows 7.
SiteShoter allows you to extend the Web browser size according to the size of the Web page, so the entire Web page will be captured. However, be aware that this feature won’t work on Web pages with multiple frames.