Console output from MFC dialog based app

[Ajay Shinde]

Dear All,

I have developed a MFC dialog based application. Now when I execute this app
from command prompt, I need to write some text back to console.
In console application we achieve this using functions like printf(),
puts(), etc.

Please let me know how do I achieve same in dialog based application since
printf() and other functions are not working here.

Thanks,
Ajay

[AliR (VC++ MVP)]

You can't write to the same console window that you were ran from, but you
can create a console window and write to that.

Take a look at AllocConsole, ReadConsole, and WriteConsole.

Here is an example:
http://www.codeproject.com/KB/cpp/ConsoleAdapter.aspx

AliR.

"Ajay Shinde" <AjayS...@discussions.microsoft.com> wrote in message
news:45748FA7-EEB4-4CFB...@microsoft.com...

[David Lowndes]

Under XP (and presumably later OS's) you can use AttachConsole like
this:

AttachConsole( ATTACH_PARENT_PROCESS );

int hCrt;
FILE *hf;

hCrt = _open_osfhandle( (intptr_t)
GetStdHandle(STD_OUTPUT_HANDLE), _O_TEXT );
hf = _fdopen( hCrt, "w" );
*stdout = *hf;
int i = setvbuf( stdout, NULL, _IONBF, 0 );

SetConsoleCtrlHandler( HandlerRoutine, true );

printf( "Hello World\n" );

Under other OS's I'm not aware of how you can do it other than to
cheat by having 2 separate programs - a console one with a .com
extension and a GUI one with a .exe extension. The .com starts first
and can then conditionally run the .exe version.

Dave

[Joseph M. Newcomer]

A more important question is "why do you think you need to write to a console?" For
example, for debug tracing, the TRACE macro works exceedingly well, and if you need
something that will be in the final product, something like my Logging ListBox is a better
choice. Generally, although it is possible to do so, it should generally be considered
bad practice to do so.

So instead of asking how to do something that isn't very good practice, why not ask a
question based on what you are trying to accomplish?
joe

On Fri, 18 Apr 2008 05:59:00 -0700, Ajay Shinde <AjayS...@discussions.microsoft.com>
wrote:

Joseph M. Newcomer [MVP]
email: newc...@flounder.com
Web: http://www.flounder.com
MVP Tips: http://www.flounder.com/mvp_tips.htm

[Ajay Shinde]

Thanks AliR for your response.
Solution provided by David solved the issue.

[Ajay Shinde]

Thanks a ton David.
It worked.