You don't, those are just shortcuts on Windows. On Mac OS X, they're just useless files that wouldn't do you any good even if you did open it with something.
Either the files you're looking for are elsewhere on the flash drive, or you copied shortcuts to the files instead of the files themselves. In the latter case, there's nothing you can do except go back and get the actual files.
I last used my pen drive in windows 7 and once i inserted in my apple macbook pro it shows as .Ink extension and I can't able to open my pen drive which have some important official documents.
Kindly any one help me in this issue.