string to upper case

Gurus,
Is there a function in gcc which would convert a STRING (std::string) to upper case?

Thanks in Advance

std::transform() should work. I have two versions
of g++. On one it works, on another (older) it has
a compiler error.

Code:

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#include <iostream>
#include <algorithm>
#include <string>

using namespace std;

int main(int argc, char* argv[])
{

    string str = "Hello World";

    transform(str.begin(),str.end(), str.begin() , toupper);

    cout << str << endl;

    return 0;
}

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if you can use the windows.h header, use

Code:

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ToUpper(const char*);

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thanks

oops, i made a mistake...
it's

Code:

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CharUpper(const char*);

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