unknown stream from choice.exe

Hi, I'm writing a "more" like program in c that reads from stdin. I'm using ReadFile() from windows.h to read the string and changes the console color. Everyting works great except it's not working with choice.exe (from win2003 support tools, which is the 32bit version of choice.com).

Here is a sample of what I'm talking about.

Code:

  set /p errorlevel=[RED]enter key:[/RED] | colorize.exe
  choice /C:123 [RED]select[/RED] | colorize.exe
  choice /C:123 [RED]select[/RED] >nul
  choice /C:123 [RED]select[/RED] 2>nul

Here, "set" worked but "choice" fails. I tried redirecting stdin and stderr but the text still shows up. Is there a third stream at work here? Is there a way to get the text?

Thanks in advance.

Error output from choice.exe, and probably all the other command line tools goes through stderr, which isn't hooked up through piping.

Not sure how you're still seeing the error message when you use the last of the example command lines though, that stops any output from appearing for me.

Thanks for the reply.

I tried piping it to more and the message disappears, so it shouldn't be the error stream then...?

Code:

choice /C:123 [RED]select[/RED] | more