sub worker_start
{
 my ($kernel,$session,$heap,@args) = @_[KERNEL, SESSION, HEAP, ARG0 .. $#_];
    $heap->{postback} =$args[0]; 
    $heap->{filename} =$args[1]; 
    
    $heap->{cmdline} = POE::Wheel::Run::Win32->new(...);
    $kernel->sig_child($heap->{cmdline}->PID, "sig_child");
}