[FFmpeg-user] screen_capture_recorder to record 2nd monitor

I use exactly what they suggest on the screen_capture_recorder ffmpeg faq to record desktop. ffmpeg.exe -f dshow -i video="screen-capture-recorder":audio=%Device% -vcodec libx264 -pix_fmt yuv420p -preset ultrafast -acodec pcm_s16le -ac 1 -ar 22050 -t %Duration% out.mkv works fine. But it records everything. I specifically only want to record what's on the 2nd monitor. Windows 7 64 bit. Anyone have any ideas?