private static extern bool CryptUnprotectData(ref DPAPINativeDATABLOB cipherText,
ref string description,
ref DPAPINativeDATABLOB entropy,
IntPtr reserved,
ref DPAPINativeCRYPTPROTECTPROMPTSTRUCT prompt,
int flags,
ref DPAPINativeDATABLOB plainText);
///<summary>
/// Performs encryption on the data in a <see cref="DPAPINativeDATABLOB"/> structure
///</summary>
///<param name="plainText">Structure that contains the plaintext to be encrypted.</param>
///<param name="description">A readable description of the data to be encrypted.</param>
///<param name="entropy">Structure that contains a password or other additional entropy used to encrypt the data.</param>
///<param name="reserved">Reserved for future use and must be set to NULL.</param>
///<param name="prompt">Structure that provides information about where and when prompts are to be displayed and what the content of those prompts should be.</param>
///<param name="flags">Crypt Protection</param>
///<param name="cipherText">Structure that receives the encrypted data.</param>
///<returns>If the function succeeds, then <c>TRUE</c> else <c>FALSE</c>.</returns>
private static bool ProtectData(ref DPAPINativeDATABLOB plainText,
string description,
ref DPAPINativeDATABLOB entropy,
IntPtr reserved,
ref DPAPINativeCRYPTPROTECTPROMPTSTRUCT prompt,
int flags,
ref DPAPINativeDATABLOB cipherText)
{
return CryptProtectData(ref plainText, description, ref entropy, reserved, ref prompt, flags, ref cipherText);
}