// This code uses the #import directive.
// Put the following line at the beginning of your module
#import "XCEEDSCO.DLL" no_namespace named_guids 

CoInitialize( NULL );

try
{
  IXceedStreamingCompressionPtr piComp; 
  piComp.CreateInstance( CLSID_XceedStreamingCompression ); 
  piComp->License( _bstr_t( L"your license key ) ); 

  IXceedBZip2CompressionFormatPtr piBZip2; 
  piBZip2.CreateInstance( CLSID_XceedBZip2CompressionFormat );  

  piComp->CompressionFormat = IXceedCompressDataPtr( piBZip2 );  

  char* pcData = "This is the data to compress compress";  

  DWORD dwBytesWritten;  

  piComp->WriteFile( ( BYTE* )pcData, strlen(pcData) , cfpCompress, 
                     TRUE, "c:\\temp\\compressed.cmp", FALSE, &dwBytesWritten );  

  MessageBox( NULL, "Memory compressed successfully to file", "Compression result", MB_OK ); 
}
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();