did someone email you a hpgl file and you're not sure how to open it? maybe you have found a hpgl file on your computer and wondering what it's for? windows might tell you that you can't open it, or in the worst case, you might encounter a hpgl file related error message.

How would the previous sentence be correctly capitalized?
Did someone email you a HPGL file and you're not sure how to open it? Maybe you have found a HPGL file on your computer and wondering what it's for? Windows might tell you that you can't open it, or in the worst case, you might encounter a HPGL file related error message.