enum PreKeys
{
HKLM,
HKCU,
HKCC,
HKDD,
HKCR,
HKU,
HKPD,
};

// Fungsi Untuk membaca value registry yang berupa string
char* ReadStringValue(PreKeys PreKey, char *Subkey, char *Value)
{
HKEY hPkey, hKey;
LONG lResult;
BYTE buffer[1024] = {'\0'}; // Inisiasi agar tidak berisi sampah
hPkey = GetPredefinedKey(PreKey);
char *pszData;
char *Data = new char[1024]; // Buffer (heap) untuk return
unsigned long size = sizeof(buffer)-1;
lResult = RegOpenKeyEx(hPkey, Subkey, 0, KEY_READ, &hKey);

if (lResult == ERROR_SUCCESS)
{
lResult = RegQueryValueEx(hKey, Value, 0, 0, buffer, &size);
if (lResult == ERROR_SUCCESS)
{
pszData = (char*) buffer;
strncpy(Data, pszData, sizeof(Data)-1);
delete pszData;
return Data;
}
else
{
return NULL;
}
}
else
{
return NULL;
}

RegCloseKey(hKey);
}

char* value = ReadStringValue(HKCU, "SOFTWARE\\My App\\setting", "setting1");
if (strstr("yes", value) > 0 ){
// do something
}