Checking if your kit is complete...
Looks good
Writing Makefile for Tk::EntryCheck
cp lib/Tk/EntryCheck.pm blib/lib/Tk/EntryCheck.pm
Manifying blib/man3/Tk::EntryCheck.3
PERL_DL_NONLAZY=1 /export/home/cpanrun/build/5.8.0/bin/perl "-MExtUtils::Command::MM" "-e" "test_harness(1, 'blib/lib', 'blib/arch')" t/*.t
t/Tk-EntryCheck....1..1

One window will pop up now...

The following line will produce a warning...
EntryCheck: content of textvariabe too long at t/Tk-EntryCheck.t line 47

The following line will produce a warning...
EntryCheck: invalid chars by textvariable at t/Tk-EntryCheck.t line 53

Result:  ok ok ok ok ok

ok 1
ok
All tests successful.
Files=1, Tests=1,  4 wallclock secs ( 0.74 cusr +  0.13 csys =  0.87 CPU)
Installing /export/home/cpanrun/build/5.8.0/lib/site_perl/5.8.0/Tk/EntryCheck.pm
Installing /export/home/cpanrun/build/5.8.0/man/man3/Tk::EntryCheck.3
Appending installation info to /export/home/cpanrun/build/5.8.0/lib/5.8.0/sun4-solaris-thread-multi/perllocal.pod