Hi All,

I discovered following issue with the VC 7.1 compiler regarding the
backword compatibility.

I created a dll (Redirect.dll) which exposes a function and simply
writes some text (say "Hello World") to stderr stream. I also created a
driver program (driver.exe) and used the exposed function from the above
dll. The driver.exe tries to redirect the stderr stream to a file
"stderr.txt" before calling the method from the dll. (used freopen here)
After calling the dll method it writes some text to stderr stream as
well (Say "Driver Hello World")

Now Please look at the observations below.
   
1. If I compile both exe and the dll either in VC6 or VC7 then the
messages appear either on the stderr(console) or the file depending on
whether it was redirected.

2. Now if I compile the dll in VC6 and the exe in VC7, I get the
messages successfully on the console(stderr stream) both from the dll
and the exe, when no redirection is done. The moment I redirect the
stderr stream to a file all messages from the exe get written to the
file but no message from the dll gets written to the file. No other
functionality is broken.

    - One of the colution to the problem could be to recompile the dll with
the new compiler. But the limitation is many a times these dlls are a
part of SDK released by a third party.

Can anyone please tell me if there is any workaround to redirect the
messages written by the dll to a file?? Is this a know issue? Has anyone
 faced this issue before?

Please let me know.

Thanks,
Navanath