I'm now using IPC::Open2 along with perl tk on Windows, to allow the program to call a child program to do some background work and prevent locking up the Tk GUI. The problem I have though is that the IPC::Open2 code doesn't seem to work unless there is a DOS window. I found this code in the "perl cookbook" to remove the DOS window when using perl/Tk, but it can't work along with IPC::Open2: 
#!/usr/bin/perl -w
# loader - starts Perl scripts without the annoying DOS window
use strict;
use Win32;
use Win32::Process;

# Create the process object.

Win32::Process::Create($Win32::Process::Create::ProcessObj,
    'D:/perl/bin/perl.exe',      # Whereabouts of Perl
    'perl c:/f1.pl',             #
    0,                           # Don't inherit.
    DETACHED_PROCESS,            #
    ".") or                      # current dir.
die print_error();

sub print_error() {
    return Win32::FormatMessage( Win32::GetLastError() );
}

[download]
Does anyone have any idea how I might make this work? Maybe using some other piping or socket type operations? I am on Windows, though, so the perl there doesn't yet fully support fork when you use other thread unsafe modules. I've found that out the hard way several times. Thanks for any info!!!

Justin Eltoft

"If at all god's gaze upon us falls, its with a mischievous grin, look at him" -- Dave Matthews

In reply to IPC::Open2, Tk, and DOS window by Eradicatore

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