void HighLevel_Sign(BYTE** signature, DWORD* count)
{
	_out<<std::endl;
	_out<<TEXT("   High-level sign   ")<<std::endl;
	_out<<TEXT("================================")<<std::endl;

	// Get certificates for receivers
	HCERTSTORE  hSystemStore; 

	if(!(hSystemStore = CertOpenSystemStore(NULL, TEXT("MY"))))
	{
		Error( TEXT("CertOpenSystemStore") );
		return;
	}

	_out<<TEXT("System store has opened")<<std::endl;

	PCCERT_CONTEXT pCert=NULL;

	while(pCert=CertEnumCertificatesInStore(hSystemStore,pCert))
	{
		// Choose the very first certificate with specified algorithm and associated private key
		if(!strcmp(pCert->pCertInfo->SubjectPublicKeyInfo.Algorithm.pszObjId,	"1.2.840.113549.1.1.1"))
		{
			DWORD dwKeySpec;
			HCRYPTPROV hProv;
			if(CryptAcquireCertificatePrivateKey(pCert,0,NULL,&hProv,&dwKeySpec,NULL))
			{
				CryptReleaseContext(hProv,0);
				break;
			}
		}
	}

	_out<<TEXT("Certificate found")<<std::endl;

	//---
	CRYPT_SIGN_MESSAGE_PARA SignPara;
	ZeroMemory(&SignPara,sizeof(SignPara));

	SignPara.cbSize=sizeof(SignPara);
	SignPara.dwMsgEncodingType=X509_ASN_ENCODING | PKCS_7_ASN_ENCODING;
	SignPara.HashAlgorithm.pszObjId=(LPSTR)CertAlgIdToOID(CALG_MD5);
	SignPara.pSigningCert=pCert;
	SignPara.cMsgCert=1;
	SignPara.rgpMsgCert=&pCert;

	char string[]="Test";

	const BYTE* DataArray[]={(BYTE*)string};  
	DWORD SizeArray[]={strlen(string)};

	*count=0;

	if(!CryptSignMessage(&SignPara,true,1,DataArray,SizeArray,NULL,count))
	{
		Error( TEXT("CryptSignMessage") );
		return;
	}

	*signature=static_cast<BYTE*>(malloc(*count));

	if(!CryptSignMessage(&SignPara,true,1,DataArray,SizeArray,*signature,count))
	{
		Error( TEXT("CryptSignMessage") );
		return;
	}

	_out<<TEXT("Signature content is received")<<std::endl;

	// Free cryptographic contexts
	CertFreeCertificateContext(pCert);
	CertCloseStore(hSystemStore,0);
}