Returns True if the CQClearQuest object is created on the UNIX system and Linux platforms.
Perl
$ClearQuestObj->IsUnix();
Perl
use CQPerlExt;
my $cqobject = CQClearQuest::Build();
$is_Windows_flag = $cqobject->IsUnix();
CQClearQuest::Unbuild($cqobject);