Printing to console in Windows Forms app

[Vadru93]

Hello!
I want to be able to print debugging information, but when I try to print to the console, nothing gets shown and after a few prints I get an unhandled exception, that do get printed to the console...

Here is the code I use to create the console And I call it from inside the forms_load function:


#pragma unmanaged
static const WORD MAX_CONSOLE_LINES = 500;

void RedirectIOToConsole()
{
int hConHandle;
long lStdHandle;
CONSOLE_SCREEN_BUFFER_INFO coninfo;
FILE* fp;

// allocate a console for this app
AllocConsole();

// set the screen buffer to be big enough to let us scroll text
GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &coninfo);
coninfo.dwSize.Y = MAX_CONSOLE_LINES;
SetConsoleScreenBufferSize(GetStdHandle(STD_OUTPUT_HANDLE), coninfo.dwSize);

// redirect unbuffered STDOUT to the console
lStdHandle = (long)GetStdHandle(STD_OUTPUT_HANDLE);
hConHandle = _open_osfhandle(lStdHandle, _O_TEXT);
fp = _fdopen(hConHandle, "w");
*stdout = *fp;
setvbuf(stdout, NULL, _IONBF, 0);

// redirect unbuffered STDIN to the console
lStdHandle = (long)GetStdHandle(STD_INPUT_HANDLE);
hConHandle = _open_osfhandle(lStdHandle, _O_TEXT);
fp = _fdopen(hConHandle, "r");
*stdin = *fp;
setvbuf(stdin, NULL, _IONBF, 0);

// redirect unbuffered STDERR to the console
lStdHandle = (long)GetStdHandle(STD_ERROR_HANDLE);
hConHandle = _open_osfhandle(lStdHandle, _O_TEXT);
fp = _fdopen(hConHandle, "w");
*stderr = *fp;
setvbuf(stderr, NULL, _IONBF, 0);

// make cout, wcout, cin, wcin, wcerr, cerr, wclog and clog
// point to console as well
std::ios::sync_with_stdio();
}

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