in reply to Re^2: Question on Win32::Process
in thread Question on Win32::Process

It is a direct quote from the "Process Creation Flags" documentation in the MSDN Library 2005

DWIM is Perl's answer to Gödel

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Re^4: Question on Win32::Process
by BrowserUk (Patriarch) on Dec 29, 2005 at 09:31 UTC

    Interesting. This is a direct quote from MSDN on-line 

    CREATE_NO_WINDOW
0x08000000    This flag is ignored.

    [download]

    I wonder which one is authoritative?

    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
    "Science is about questioning the status quo. Questioning authority".
    In the absence of evidence, opinion is indistinguishable from prejudice.
[reply]
[d/l]

      Indeed interesting. The version of MSDN I'm using is dated March 2005. I notice that the online version is December 2005 so I guess that is authoritive. But I can't see how they can have changed the behaviour for older versions of the OS, or even unpatched current versions. There is no indication of a change in behaviour in the documentation so unless it never worked ...

      DWIM is Perl's answer to Gödel
[reply]

        Stranger and stranger. I found this on the web somewhere. 

        when you try to create a console process with CreateNoWindows= true it
+ 
will work fine on windows NT/2k/xp but on windows 9x/ME the console 
window will pop up anyway.

Quote from MSDN (Article "Process creation flags") 

CREATE_NO_WINDOW: 
The process is a console application that is run without a console win
+dow. 
This flag is valid only when starting a console application. 
This flag cannot be used with MS-DOS-based applications. 
Windows Me/98/95: This value is not supported. 

I don't think this "bug" will be fixed. 
This flag simply isn't supported by Win95/98/Me.

        [download]

        Whether they've decided to stop mentioning it in the docs, or the ability has been removed in one of the latest set of updates I don't know. Maybe they are trying to make it harder for people to create silent keyloggers and the like?

        Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
        Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
        "Science is about questioning the status quo. Questioning authority".
        In the absence of evidence, opinion is indistinguishable from prejudice.
[reply]
[d/l]

      I emailed MS and received the following reply from Julie Solon:

      Thanks for the feedback. I went back to the developer who asked me to make this change a few months back, and he apologized for the mistake. I’ll restore the text with a slight modification:
      The process is a console application that is being run without a console window. Therefore, the console handle for the application is not set.

      This flag is ignored if the application is not a console application, or if it is used with either CREATE_NEW_CONSOLE or DETACHED_PROCESS.
      DWIM is Perl's answer to Gödel
[reply]

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