First: run RegQueryValueEx to get type and necessary memory size:
Single byte code:
1 DWORD type, size; 2 vector<string> target; 3 if ( RegQueryValueExA( 4 your_key, // HKEY 5 TEXT("ValueName"), 6 NULL, 7 &type, 8 NULL, 9 &size ) != ERROR_SUCCESS ) 10 return; 11 if ( type == REG_MULTI_SZ ) 12 { 13 vector<char> temp(size); 14 15 if ( RegQueryValueExA( 16 your_key, // HKEY 17 TEXT("ValueName"), 18 NULL, 19 NULL, 20 reinterpret_cast<LPBYTE>(&temp[0]), 21 &size ) != ERROR_SUCCESS ) 22 return; 23 24 size_t index = 0; 25 size_t len = strlen( &temp[0] ); 26 while ( len > 0 ) 27 { 28 target.push_back(&temp[index]); 29 index += len + 1; 30 len = strlen( &temp[index] ); 31 } 32 }
Unicode:
1 DWORD type, size; 2 vector<wstring> target; 3 if ( RegQueryValueExW( 4 your_key, // HKEY 5 TEXT("ValueName"), 6 NULL, 7 &type, 8 NULL, 9 &size ) != ERROR_SUCCESS ) 10 return; 11 if ( type == REG_MULTI_SZ ) 12 { 13 vector<wchar_t> temp(size/sizeof(wchar_t)); 14 15 if ( RegQueryValueExW( 16 your_key, // HKEY 17 TEXT("ValueName"), 18 NULL, 19 NULL, 20 reinterpret_cast<LPBYTE>(&temp[0]), 21 &size ) != ERROR_SUCCESS ) 22 return; 23 24 size_t index = 0; 25 size_t len = wcslen( &temp[0] ); 26 while ( len > 0 ) 27 { 28 target.push_back(&temp[index]); 29 index += len + 1; 30 len = wcslen( &temp[index] ); 31 } 32 }