Making an array for a static casted indexed array - c++

Question

I don't know if my title is right but I am trying to eliminate duplicate so I think I should put this definitions in an array. Can someone suggest me how I could put the pButtons in array? I am thinking something like pButton[EButtonHost], pButton[EButtonUsername] etc.
#define pButtonHost static_cast<XQtMultipleStringInputButton*>(m_pButtonList[EButtonHost])
#define pButtonUsername static_cast<XQtMultipleStringInputButton*>(m_pButtonList[EButtonUsername])
#define pButtonPassword static_cast<XQtMultipleStringInputButton*>(m_pButtonList[EButtonPassword])
I have a method below like this.
XIniFile readIniFile;
readIniFile.open(k_systemIniFile, EIniReadOnly);
string data;
readIniFile.readString("Server", "host", data);
pButtonHost->setString(data);
m_host = pButtonHost->getString();
readIniFile.readString("Server", "username", data);
pButtonUsername->setString(data);
m_username = pButtonUsername->getString();
readIniFile.readString("Server", "password", data);
pButtonPassword->setString(data);
m_password = pButtonPassword->getString();
They look like duplicates so I am trying to optimize it. Thanks!
Update:
I have something like this now. Would this be right? or do you have any better suggestions?
for (int i = 0; i < 3; ++i) {
readIniFile.readString("Server", k_dataList[i], data);
static_cast<XQtMultipleStringInputButton*>(m_pButtonList[i])->setString(data);
m_pData[i] = static_cast<XQtMultipleStringInputButton*>(m_pButtonList[i])->getString();
}

Answer 1

A below code looks clear by using auto and `lambda',
auto GetConfigInfo = [&](string section_name, ButtonType btn_type)-> string
{
readIniFile.readString("Server", section_name, data);
m_pButtonList[btn_type_]->setString(data);
return m_pButtonList->getString();
};
m_host = GetConfigInfo("host", EButtonHost);
m_username = GetConfigInfo("username", EButtonUserName);
m_password = GetConfigInfo("password", EButtonPassword);
and a define data type by using struct can be other method.
struct ConfigDefine
{
string section_;
ButtonType btn_type_; //your enum button type, such as EButtonHost, EButtonUserName
string& result_;
}configs[] =
{
{"host", EButtonHost, m_host},
{"username", EButtonUserName, m_username},
{"password", EButtonPassword, m_password}
};
for_each(std::begin(configs), std::end(configs), [&](ConfigDefine& config)
{
readIniFile.readString("Server", config.section_, data);
m_pButtonList[config.btn_type_]->setString(data);
config.result_ = pButtonHost->getString();
});

Answer 2

Do you intend to have something like this one?
#define ASIZE 3
int indx[ASIZE] = {EButtonHost, EButtonUsername, EButtonPassword};
string s[ASIZE] = {"host", "username", "password"};
string *m[ASIZE] = {&m_host, &m_username, &m_password};
for (int i = 0; i < ASIZE; i++) {
readIniFile.readString("Server", s[i].c_str(), data);
pButtonHost->setString(data);
*m[i] = pButtonHost->getString();
}