// This code uses the #import directive.

// Put the following line at the beginning of your module
#import "XCEEDCRY.DLL" no_namespace named_guids 

CoInitialize( NULL );

try
{
  IXceedHashingPtr piHash; 

  piHash.CreateInstance( CLSID_XceedHashing ); 
  piHash->License( _bstr_t( L"your license key ) ); 

  IXceedSHAHashingMethodPtr piSHA; 

  piSHA.CreateInstance( CLSID_XceedSHAHashingMethod ); 
  piSHA->PutHashSize( 256 ); 

  piHash->HashingMethod = IXceedHashDataPtr( piSHA );  

  const char* pszSource = "This is the data to hash"; 
  DWORD dwSourceSize = lstrlen( pszSource ) + 1; // Let's say we want to hash the null-char too 
  BYTE* pcHashValue = NULL; 
  short nHashValueSize = 0;  

  piHash->Hash( ( BYTE* )pszSource, dwSourceSize, TRUE ); 

  piSHA->GetHashValue( &pcHashValue, &nHashValueSize );  

  //Do something with the HashValue...  

  MessageBox( NULL, "Data hashed successfully", "Hashing result", MB_OK );  

  CoTaskMemFree( pcHashValue ); 
}
catch( const _com_error& xErr )
{
  char szMsg[50]; 
  wsprintf( szMsg, "Error %08x\n", xErr.Error() ); 
  MessageBox( NULL, szMsg, "Error", MB_OK ); 
}
catch( ... )
{
  MessageBox( NULL, "Unknown error", "Error", MB_OK ); 
} 

CoUninitialize();