Re: what's wrong with this code?

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#13870

From: Remy Lebeau (TeamB)
Date: Sun, 14 Sep 2003 06:04

42 lines
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"FrankW" <nospam@nospam.com> wrote in message
news:3f63f54e@newsgroups.borland.com...

> Here is the code that will cause an AV if the integer
> "MainApp" not exist, I was hoping OpenKey will
> create the key if it does not exist.

It will create the key itself, if you have the CanCreate parameter set to
true.  However, that does not mean that the "MainApp" value will always
exist inside the key, especially if the key is being created anew.  You have
to test for that separately, ie:

    void __fastcall GetParam(int &MainApp)
    {
        MainApp = 0;

        TRegistry *Reg = NULL;
        try
        {
            Reg = new TRegistry;
            Reg->RootKey = HKEY_CURRENT_USER;

            if( Reg->OpenKey("Software\\Microsoft\\Internet Explorer",
true) )
            {
                if( Reg->ValueExists("MainApp") )
                    MainApp = Reg -> ReadInteger("MainApp");
            }
        }
        catch(Exception&) {}
        delete Reg;
    }


Gambit


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From: "Remy Lebeau \(TeamB\)" <gambit47@yahoo.com>
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Subject: Re: what's wrong with this code?
Date: Sat, 13 Sep 2003 23:04:57 -0700
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