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BOOK: Visual Basic 2005 Programmer's Reference
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Old April 29th, 2006, 01:00 AM
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Default Capturing the output of a DOS mode program

Hi Rod

I need to run a DOS program from within my application and capture the output. Basically the DOS program is a command line compiler. I need to grab the output and display it in my VB.NET 2005 program. I have searched around for a solution and looked in your excellent book and web site. I can find stuff for VB6 but nothing for VB.NET. Seems that it ought to be simple but looks like it isn't. Any pointers would be much appreciated


Jon Masterson
Jon Masterson
Old April 29th, 2006, 09:15 AM
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Hi Jon,

Like everything in .NET, it's not too hard once you know which classes and namespaces to use. See this example:


Here's the heart of it:

    ' Set start information.
    Dim start_info As New ProcessStartInfo(txtProgram.Text)
    start_info.UseShellExecute = False
    start_info.CreateNoWindow = True
    start_info.RedirectStandardOutput = True
    start_info.RedirectStandardError = True

    ' Make the process and set its start information.
    Dim proc As New Process()
    proc.StartInfo = start_info

    ' Start the process.

    ' Attach to stdout and stderr.
    Dim std_out As StreamReader = proc.StandardOutput()
    Dim std_err As StreamReader = proc.StandardError()

    ' Display the results.
    txtStdout.Text = std_out.ReadToEnd()
    txtStderr.Text = std_err.ReadToEnd()

    ' Clean up.

Best wishes,

Author of "Visual Basic 2005 Programmer's Reference"
Old April 29th, 2006, 10:33 AM
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Hi Rod

Many thanks - that did the trick once I figured out how to use the arguments property :)

I searched your site first and only came up with the VB6 version - I should have looked harder

Jon Masterson

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