internal static extern bool CredRead(string targetName, NativeCredentialType type, CredentialFlags flags, out IntPtr credential);
internal static extern bool CredDelete (string targetName, NativeCredentialType type, CredentialFlags flags);
internal static extern bool CredRead (string targetName, NativeCredentialType type, CredentialFlags flags, out IntPtr credential);
internal static extern bool CredDelete(string targetName, NativeCredentialType type, CredentialFlags flags);