how to record screen?

i have two software! camtasia studio and you cam :)

Camtasia Studio 7.1.1 download

http://www.techsmith.com/download/camtasia/

Key for Camtasia Studio (choose 1)

1 :  HLCZF-HDCPL-KGB6W-ZSCAZ-VF6A2

2 :  CD2AA-QZBHD-C3KJL-E9HRV

3 :  GCABC-CPCCE-BPMMB-XAJXP-S8F6R

download links...
youcam :
youcan find at google.com :)

serial key :
http://www.mediafire.com/view/?j9qzaclho7ekur5