#include <Wincrypt.h>
#pragma comment( lib, "Crypt32.lib" )

//oCert is EAGetMailObjLib::ICertitificatePtr;
	
	// get serial number
	PCERT_CONTEXT pCertContext = (PCERT_CONTEXT)oCert->Handle;
	int len = pCertContext->pCertInfo->SerialNumber.cbData;
	TCHAR* pszSerial = new TCHAR[2*len+1];
	pszSerial[2*len] = _T('\0');
	TCHAR* pszBuf = pszSerial;

	for( int i = len-1; i >= 0 ; i-- )
	{
		::_stprintf( pszBuf, _T("%02x"), pCertContext->pCertInfo->SerialNumber.pbData[i] );
		pszBuf +=2;
	}
	//pszSerial is the serial number
	// please use delete [] pszSerial to free the memory.

	delete [] pszSerial;

	// get email address;
	DWORD dwOut = 0;
	dwOut = ::CertGetNameString(
		pCertContext,
		CERT_NAME_EMAIL_TYPE, 
		0,
		0,
		NULL,
		0 );

	if( dwOut == 0 )
	{
		DWORD dwLastError = ::GetLastError();
		return;
	}

	TCHAR* pszEmail = new TCHAR[dwOut+1];
	pszEmail[dwOut] = _T('\0');

	dwOut = ::CertGetNameString(
		pCertContext,
		CERT_NAME_EMAIL_TYPE, 
		0,
		0,
		pszEmail,
		dwOut );

	if( dwOut == 0 )
	{
		DWORD dwLastError = ::GetLastError();
		delete []pszEmail;
		return;
	}

	// please use delete [] szEmail to free the memory.

	delete []pszEmail;