Convert void* representation of a dword to wstring

Question

I am having dumb monday so my apologies for posting such a newbie-like question.

I am using CRegKey.QueryValue to return a dword value from the registry. QueryValue writes the value into void* pData and the length into ULONG* pnBytes.

Now there is a way of getting it from pData into a wstring probably via stringstream. The closest I came was getting the result as a hex string. I was about to work on converting the hex representation to a dword and then from there to a wstring when I decided that was just dumb and ask on here instead of wasting another hour of my life on the problem.

Answer 1

Why don't you use CRegKey::QueryDWORDValue instead? Then you could just swprintf_s to print it into a string (if you wish to).

Answer 2

I didn't test but should be fine:

/* To test if the value is REG_DWORD and get it */
DWORD dwValue;
switch (key->QueryDWORDValue(lpName, &dwValue)) {
    case ERROR_SUCCESS:
        cout << "All ok, value: " << dwValue;
        break;

    case ERROR_INVALID_DATA:
        cout << "Error, not DWORD value";
        break;

    default:
        cout << "Some other error";
        break;
}

/* to obtain the type */
DWORD dwType;
if (key->QueryValue(lpName, &dwType, NULL, NULL) == ERROR_SUCCESS)) /* use 'dwType' here... */