Display last C++ error in Visual Studio output console

gistfile1.cpp

DWORD dw = GetLastError(); 

char *TextSize;
std::printf("Error has occured: ");

FormatMessage(0x00000100 | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, 0,
			dw, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &TextSize, 0, 0);

OutputDebugString((LPCWSTR)TextSize);