 The Biz On Those File Extensions

A file extension are the few letters that come after the filename, usually consisting of three or four letters. For example:

fileexample.dll

The .dll would be the file extension. These so-called extensions are important in determining what type of file the file is. The .dll, in this case, stands for "Dynamic Link Library", which is a data holding place for other applications (hence the name "Library"). Note that .dll files are not open-able and should not be messed around with or deleted--doing so may cause serious problems in the program that they are associated to or corrupt the Windows operating system. But enough about .dll extensions...


Have you ever seen this before?

This is an unknown file type (the icon can also look like a blank sheet of paper). If you double-click on it, Windows will ask what type of program to open this unknown file with. If you know, great, choose the program from the "browse" list and your set. However, if you don't know, then look at the file extension.. If it doesn't have an extension, then you can always try the automatic Internet search option, but it is not always guaranteed to work.

But if it does have an extension, then you might be able to tell what program it is associated with. If you don't, then research it. I highly recommend the site Filext (filext.com). Just type in the extension and you get a full explanation of what it is.

Note that most unknown files cannot be opened; they usually accompany another program (such as the .dll file).

You can also change the extension by retyping it (although it doesn't always work on PCs), such as chaning a file to a .wmv (windows media player/viewer). Of course, if that file is not programmed to run with .wmv, it won't open.

So the next time you see an unknown file type, do not be afraid, be courageous. Just don't mess around with it unless you know what it is and what you're doing.