converting a string to upper case

[UprightMan]

If I have a string containing lowercase letters and numbers, is there an easy way to convert it to a string containing the same number but with uppercase letters? (without using the ios::uppercase flag).

i.e. string x = "0x00cc"
x.dosomething();
cout << x ; outputs 0x00CC

TIA

[UprightMan]

nm, did it using a loop and toupper().