CSimpleIniA ini;
ini.SetUnicode();
ini.LoadFile("myfile.ini");
const char * pVal = ini.GetValue("section", "key", "default");
ini.SetValue("section", "key", "newvalue");

// load from a data file
CSimpleIniA ini(a_bIsUtf8, a_bUseMultiKey, a_bUseMultiLine);
SI_Error rc = ini.LoadFile(a_pszFile);
if (rc < 0) return false;

// load from a string
std::string strData;
rc = ini.LoadData(strData.c_str(), strData.size());
if (rc < 0) return false;

// get all sections
CSimpleIniA::TNamesDepend sections;
ini.GetAllSections(sections);

// get all keys in a section
CSimpleIniA::TNamesDepend keys;
ini.GetAllKeys("section-name", keys);

// get the value of a key
const char * pszValue = ini.GetValue("section-name", 
    "key-name", NULL /*default*/);

// get the value of a key which may have multiple 
// values. If bHasMultipleValues is true, then just 
// one value has been returned
bool bHasMultipleValues;
pszValue = ini.GetValue("section-name", "key-name", 
    NULL /*default*/, &bHasMultipleValues);

// get all values of a key with multiple values
CSimpleIniA::TNamesDepend values;
ini.GetAllValues("section-name", "key-name", values);

// sort the values into the original load order
values.sort(CSimpleIniA::Entry::LoadOrder());

// output all of the items
CSimpleIniA::TNamesDepend::const_iterator i;
for (i = values.begin(); i != values.end(); ++i) { 
    printf("key-name = '%s'\n", i->pItem);
}

// adding a new section
rc = ini.SetValue("new-section", NULL, NULL);
if (rc < 0) return false;
printf("section: %s\n", rc == SI_INSERTED ? 
    "inserted" : "updated");

// adding a new key ("new-section" will be added 
// automatically if it doesn't already exist)
rc = ini.SetValue("new-section", "new-key", "value");
if (rc < 0) return false;
printf("key: %s\n", rc == SI_INSERTED ? 
    "inserted" : "updated");

// changing the value of a key
rc = ini.SetValue("section", "key", "updated-value");
if (rc < 0) return false;
printf("key: %s\n", rc == SI_INSERTED ? 
    "inserted" : "updated");

// deleting a key from a section. Optionally the entire
// section may be deleted if it is now empty.
ini.Delete("section-name", "key-name", 
    true /*delete the section if empty*/);

// deleting an entire section and all keys in it
ini.Delete("section-name", NULL);

// save the data to a string
rc = ini.Save(strData);
if (rc < 0) return false;

// save the data back to the file
rc = ini.SaveFile(a_pszFile);
if (rc < 0) return false;