public static extern bool CredUnmarshalCredential( IntPtr MarshaledCredential, out CRED_MARSHAL_TYPE CredType, out IntPtr Credential );
public static extern BOOL CredMarshalCredentialA(CRED_MARSHAL_TYPE CredType, [NativeTypeName("PVOID")] void *Credential, [NativeTypeName("LPSTR *")] sbyte **MarshaledCredential);