OpenVPN has the capability of using the Windows CryptoAPI store to retrieve the public and private key needed for setting up a connection. This improves security somewhat, as the CryptoAPI store is more secure than the plaintext .crt and .key files that are normally used to set up an OpenVPN connection. In this recipe, we will configure an OpenVPN client to retrieve the required information from the CryptoAPI store when connecting to the server. This recipe was tested on Windows XP and Windows Vista but it will also work on other versions of Windows.