Let’s look at a practical example where we need to read a binary value from the Windows Registry.
The ATL Buffer has several key features that make it a valuable tool for developers: atl buffer
Under the hood, these classes allocate a buffer on the stack (for small strings) or the heap (for large strings) and perform the conversion in the constructor. This is a specialized form of an ATL Buffer designed specifically for character data. Let’s look at a practical example where we
int main() // Create an ATL Buffer CAtlBuffer buffer; DWORD dataSize = 0
DWORD dataSize = 0; RegQueryValueEx(hKey, L"MyValue", nullptr, nullptr, nullptr, &dataSize);