Hi all wise monks, I have a perl/java app running under Win32. The application consists of a perl service (Win32::Daemon) and of java classes. The perl service calls every xx hours java classes to perform some action. The java call looks like this: 
Win32::SetChildShowWindow(0);

Win32::Process::Create($ProcessObj,
                            $javaExe,
                            $commandArgs,
                            0,
Win32::Process::NORMAL_PRIORITY_CLASS|Win32::Process::CREATE_NO_WINDOW
+,
                            $installPath) or $retCode = -9;

[download]
The point of SetChildShowWindow(0) and CREATE_NO_WINDOW is to hide the console window that perl usually displays when creating new process.

This worked fine until I tried to run the same code inside a thread.

I now have a perl module JavaCall.pm with "static" subs calling the java classes. My perl service starts a thread each time it needs to call java (if the java process is not started inside a thread, the perl service does not get the shutdown event until the java process finishes). So I have something like this:

perlservice.pl: 

sub Callback_Running {
$runningThread = threads->new(\&startProcess, $installPath, $executePa
+th, $configFile, $parser, $logger, $configref, $Context);
$runningThread->detach();
}

sub startProcess {
JavaCall->callJavaClass(...);
}

[download]

JavaCall.pm: 
Win32::SetChildShowWindow(0);
Win32::Process::Create($ProcessObj,
                            $javaExe,
                            $commandArgs,
                            0,
Win32::Process::NORMAL_PRIORITY_CLASS|Win32::Process::CREATE_NO_WINDOW
+,
                            $installPath) or $retCode = -9;

[download]
And here is the mistery: This works perfect under my Windows XP SP2 Profesional Edition, English. But the console "cmd.exe" shows up on a Windows XP SP2 Home Edition, French. I do not know yet if this problem is specific to Home or French edition.

This app is distributed on users PC and I cannot have that window showing up. Any help greatly appreciated. Jerome

In reply to Win32 console window & threads by jbenezech

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