返回当前由PATH环境变量指定的可执行程序搜索路径列表.
(dos_path)
n/a
如果成功, 返回PATH环境变量中包含的路径列表.
nil 失败时.
Command: (dos_path)
("C:\\WINDOWS\\system32" "C:\\WINDOWS" "C:\\WINDOWS\\System32\\Wbem" "C:\\Program Files\\Microsoft SDK\\Bin\\." "C:\\Program Files\\Microsoft SDK\\Bin\\WinNT\\." "C:\\Program Files\\Common Files\\Autodesk Shared\\" "C:\\Program Files\\Rational\\common" "C:\\Program Files\\Microsoft Visual Studio 8\\" "C:\\Program Files\\Microsoft Visual Studio 8\\VC\\bin")