How do I get text into Visual Studio Output Window using STL IO?

Question

I always thought the output window for a MSVC++ app running in the debugger was mapped to one of the standard output streams. But When I run this code in a Windows MFC app, nothing is seen:

std::cerr << "cerr"<<std::endl;
std::cout << "cout"<<std::endl;
std::clog << "clog"<<std::endl;

Is this a Windows thing or a VC++ thing? How are functions/macros like TRACE and OutputDebugString writing to this window, and shouldn't I be able to do so without using them?

Answer 1

Here: http://stackoverflow.com/questions/73286/capturing-cout-in-visual-studio-2005-output-window Also here: http://www.codeproject.com/KB/debug/STLDebugLogger.aspx

Answer 2

There is no standard style stream mapped to the Visual Studio output window. The function that accomplishes this is OutputDebugString().

The closest thing you can get to something like this is create your own wrapper class that behaves like an ostream, and underneath calls OutputDebugStream.