C++ RegEnumValue() - fail to iterate to each value - c++

Question

I want to get all the registry values under specific key path, but RegEnumValue() always returns back the error code 259 as ERROR_NO_MORE_ITEMS and sectionValue has nonsense value. I check the registry manually and there are values under the specified key.
For example.
key is MyTestApp
key value is ManualTestCase = 10
key value is AutomationTestCase = 50
HKEY hKey; //registry key handle
LONG lResult; //result of registry operations
DWORD dwType, dwSize=0;
//try to open the key that we are currently pointing at with rootPath
lResult = RegOpenKeyEx(HKEY_LOCAL_MACHINE, rootPath, NULL, KEY_ALL_ACCESS, &hKey);
if (lResult == ERROR_SUCCESS)
{
LPTSTR className = NULL;
DWORD classNameSize = MAX_PATH;
DWORD subKey = 0;
DWORD maxSubKey;
DWORD maxClass;
DWORD value;
DWORD maxValue;
DWORD maxValueData;
DWORD securityDescriptor;
FILETIME ftLastWriteTime;
DWORD sectionNameSize;
int j;
//to get total keys for the specified path
lResult = RegQueryInfoKey(hKey, className, &classNameSize, NULL,
&subKey, &maxSubKey, &maxClass, &value, &maxValue,
&maxValueData, &securityDescriptor, &ftLastWriteTime);
if(lResult == ERROR_SUCCESS)
{
for(int i = 0; i < subKey; i++)
{
LPTSTR sectionName = new TCHAR[1096];
sectionNameSize = 1096;
ftLastWriteTime.dwHighDateTime = 0;
ftLastWriteTime.dwLowDateTime = 0;
//enumerate all the registry key names for specified path
lResult = RegEnumKeyEx(hKey, i, sectionName,
&sectionNameSize, NULL, NULL,
NULL, &ftLastWriteTime);
CString testStr = sectionName;
if(lResult == ERROR_SUCCESS)
{
j = 0;
do
{
LPTSTR sectionValue;
DWORD sectionValueSize = 4096;
DWORD dwType;
//enumerate all the values for specified key
lResult = RegEnumValue(hKey, j, sectionName,
&sectionNameSize, NULL, &dwType,
(LPBYTE)sectionValue, &sectionValueSize);
//
if(lResult == ERROR_SUCCESS)
{
//do something to the data
bool whatever = true;
}
else if(lResult == ERROR_MORE_DATA)
{
//
bool yeahSure = true;
}
j++;
}while(lResult != ERROR_NO_MORE_ITEMS);
}
delete[] sectionName;
}
}
}
RegCloseKey(hKey);

Answer 1

My guess is your problem is with how you use lResult = RegEnumKeyEx(hKey, i, sectionName,...
You are trying to enumerate values of a subkey without actually opening that subkey.