C++: Getting registry value only gives first character [duplicate]

Answer 1

You have an array of char but RegQueryValueEx requires an array of wchar_t in a wide-character build. Most programs today will be wide-character applications, but you can use the Microsoft-defined constant TCHAR instead of char or wchar_t if you're unsure.

The reason you only get a single character is because the first character has a value between 1 and 255. The high byte of such a 16-bit character code is zero, so in memory it looks like a string terminator.