Hi,
You cannot
The state o Virginia did not keep any records of births or deaths until 1853.

Before that we have to glean the info from Bible & family records, old to,bstones, etc.

The Library of Va. has some Bible records on their website with online umages if you have a Tiff viewer which most newer computer programs already have.
They recently changed the site some and now it is not as easy to navigate as it used to be but you can still see things.
Their main page is:
http://www.lva.virginia.gov/

Here is the archives & manuscripts page where you can search for Bible records I put like Carter family Bible as an example.
http://lva1.hosted.exlibrisgroup.com/F/?func=file&file_n...

Good luck.

Beth