Rails - Nov 2006 - Hiding the command window when using system() on Windows

I''m making a system call in Windows to a program from within my Rails 
app., and when it executes, a command window opens up by default for the 
duration of the program run.

I''m pretty sure that there''s a way to hide this window when I
run the
command.

Does anyone know how to do this?

Alternatively, I tried to set up a shortcut pointing to the executable 
that runs with the window minimized but wasn''t able to invoke it 
successfully using system(shortcut_name).

Any help is appreciated.

Wes

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Hi Wes,

I had a similar problem using another language. I don''t think that
there
are command line or ruby system() options that let you control this.

My solution was to write a very stupid .Net executable; that just ran 
the programme that I needed in a controlled window [:ie background & 
minimised]. From .Net its really easy to access the windowing bits of 
windows.

Not a very elegant hack, but it worked.

rgds
- matt.

Wes Gamble wrote:
> I''m making a system call in Windows to a program from within my
Rails
> app., and when it executes, a command window opens up by default for the 
> duration of the program run.
> 
> I''m pretty sure that there''s a way to hide this window
when I run the
> command.
> 
> Does anyone know how to do this?
> 
> Alternatively, I tried to set up a shortcut pointing to the executable 
> that runs with the window minimized but wasn''t able to invoke it 
> successfully using system(shortcut_name).
> 
> Any help is appreciated.
> 
> Wes

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Matt Stone wrote:
> My solution was to write a very stupid .Net executable; that just ran 
> the programme that I needed in a controlled window [:ie background & 
> minimised]. From .Net its really easy to access the windowing bits of 
> windows.
> 
> Not a very elegant hack, but it worked.
Would you be willing to share this code?  I assume it''s in C# and that 
would require a C# compiler (which I don''t have).

Thanks,
Wes

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> Would you be willing to share this code?  I assume it''s in C# and
that
> would require a C# compiler (which I don''t have).
> 
> Thanks,
> Wes
I can get my hands on a C++/C# compiler if need be.

WG

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Wes Gamble wrote:
> I''m making a system call in Windows to a program from within my
Rails
> app., and when it executes, a command window opens up by default for the 
> duration of the program run.
> 
> I''m pretty sure that there''s a way to hide this window
when I run the
> command.
> 
> Does anyone know how to do this?
> 
> Alternatively, I tried to set up a shortcut pointing to the executable 
> that runs with the window minimized but wasn''t able to invoke it 
> successfully using system(shortcut_name).
> 
> Any help is appreciated.
> 
> Wes
Wes-

Using the win32ole library, you could call the Run method of the 
Wscript.Shell object...


require ''win32ole''
cmd = "application.exe"
windowstate = 0    # hidden
wait = 1    # wait for process to complete
WIN32OLE.new(''Wscript.Shell'').Run(cmd, windowstate , wait)


Mully

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David Mullet wrote:
> Using the win32ole library, you could call the Run method of the 
> Wscript.Shell object...
> 
> 
> require ''win32ole''
> cmd = "application.exe"
> windowstate = 0    # hidden
> wait = 1    # wait for process to complete
> WIN32OLE.new(''Wscript.Shell'').Run(cmd, windowstate ,
wait)
David,

This:

  WIN32OLE.new(''WScript.Shell'').Run(command_str, 0, 1)

did the trick!!!

Thanks so much for the help.

Wes

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