How can I execute another program programmaticly......

...that is listed in the PATH under Enviroment Variables?

Currently I'm using _spawnl, but that requires a full path to the ".exe" file.

Thanks!

Try this FAQ
http://www.codeguru.com/forum/showthread.php?t=302501

You could use SearchPath(...) to retrieve the full path of the executable. It searches whatever is in the PATH variable last, so there may be a problem if the executable exists in more than one directory.