you can set the ios::uppercase flag for cout.
you can use setf member function of cout to set this flag :
[cpp]
cout.fill('0');
cout.setf(ios::uppercase);
cout<<hex<<setw(2)<<nHigherByteCRC<<" ";
cout<<hex<<setw(2)<<nLowerByteCRC <<" "<<endl;
[/cpp]
and for unsetting this flag use unsetf ...