Thanks to the reply to the post by Felipe (http://erez.wordpress.com/2008/08/11/strawberry-perl-forever/), here are the steps:
- Download Tk module from cpan (http://search.cpan.org/~srezic/Tk-804.030/)
- Extract it to a folder.
- Move it to C:\strawberry\perl\lib\
- Open Command Prompt
- Go to cd C:\strawberry\perl\lib\foldername and pressed enter.
- Then type: perl makefile.pl and pressed enter.. Wait for a few minutes till you see the command prompt.
- Then type dmake test and press Enter.
- Then type dmake install and press Enter.