Find duplicates in CString

Hi, I want to adapt a CString by removing all the duplicate characters:
example:
adfgazez -> adfgze
(there were 2 a's and two z's).

I know how to do it with a char array (double loop, so not so elegant...) But I'm only starting to learn MFC, and don't managed to write the function...

Can anyone help me.

Thanks in advance.
AzizLightAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

AlexFMCommented:
CString RemoveDuplicates(const CString& s)
{
    CString result;

    for ( int i = 0; i < s.GetLength(); i++ )
    {
        if ( result.Find(s[i]) < 0 )
            result += s[i];
    }

    return result;
}

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
AlexFMCommented:
This version is faster for long strings, but can be used only in ANSI configuration (without Unicode):

CString RemoveDuplicates(const char* s)
{
    CString result;

    bool flag[256];
    memset(flag, 0, 256*sizeof(bool));

    while ( *s )
    {
        if ( ! flag[*s] )
        {
            result += *s;
            flag[*s] = true;
        }

        s++;
    }

    return result;
}
pisselouCommented:
Thanks, but I have this error.

error LNK2001: unresolved external symbol "protected: class CString __thiscall CPage4::RemoveDuplicates(class CString const &)" (?RemoveDuplicates@CPage4@@IAE?AVCString@@ABV2@@Z)
AzizLightAuthor Commented:
Thanks. Works now.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
System Programming

From novice to tech pro — start learning today.