VC++ Sending data from a structure in one class to a ListBox in a second class.

Hello everyone, I'm building a simple RPG type game and have run into a snag with my inventory. The program is a Dialog based application, the problem I've run into is I've created a seperate class to contain all my item handling code and a listbox on the main dialog to display the names of the items. I'm trying to set the items in the listbox by using:

Code:

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m_lbInventory.AddString(CItems::PopulateShop(*holder));

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and the function code is:

Code:

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void CItems::PopulateShop(CString* holder)
{
        *holder = ShopList.m_sName;               
}

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The error I receive is:
error C2664: 'PopulateShop' : cannot convert parameter 1 from 'const char' to 'class CString *'
Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast

In that particular case I tried to use pointers in order to get the data, I am not very good with pointers yet and likely did not use them properly. Am I heading in the right direction with the pointers? Or should I be attempting to do this in a completely different way?

Study this and read tutorial

Code:

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#include <iostream>
#include <string>
using namespace std;

void set_string(string &ref_string)
{
    ref_string = "setting reference parameter";
}//set_string

void set_string(string *ptr_string)
{
    *ptr_string = "setting pointer parameter";
}//set_string

int main()
{
    string s1, s2;
    set_string(s1);
    set_string(&s2);

    cout << "s1 = " << s1 << endl;
    cout << "s2 = " << s2 << endl;

    return 1;
}//main

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Tutorial on pointers

gg