CryptAcquireCertificatePrivateKey()

static bool Interop.crypt32.CryptAcquireCertificatePrivateKey	(	SafeCertContextHandle	pCert,
		CryptAcquireFlags	dwFlags,
		IntPtr	pvParameters,
		out SafeNCryptKeyHandle	phCryptProvOrNCryptKey,
		out int	pdwKeySpec,
		out bool	pfCallerFreeProvOrNCryptKey )