$ perldoc -l Tk
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk.pod

$ grep -ril timer C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk/after.pod
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk/demos/zinc_lib/counter.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk/demos/zinc_lib/simpleradar.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk/demos/zinc_lib/Zetris.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk/Event.pm
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk/Panedwindow.pm
...

$ perldoc Tk::after
...

$ grep -ril after C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/widget_lib/arrows.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/widget_lib/Ball.pm
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/widget_lib/bounce.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/widget_lib/ctext.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/widget_lib/entry3.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/widget_lib/items.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/widget_lib/mega.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/widget_lib/photo1.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/widget_lib/search.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/widget_lib/transtile.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/widget_lib/virtevents1.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/zinc_contrib_lib/TripleRotatingWheel.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/zinc_lib/counter.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/zinc_lib/groups_in_ATC_strips.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/zinc_lib/simpleradar.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/zinc_lib/testGraphics.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/zinc_lib/wheelOfFortune.pl
C:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread\Tk\demos/zinc_lib/Zetris.pl