hide cmd window for a console app

Go to Project Properties, select the "Application" tab and locate the "Output type" dropdown button.
     Click that and select "Windows Application" as the type.

That does work, but I have the console application write lines to the console.  When I change it to a windows form, it no longer writes the lines.  I need this because this info is captured.  I just want to hide the shell.

Well, if I wanted to capture data and not show a shell I'd write the data out somewhere other than the console window.

But...

//add namespace using System.Runtime.InteropServices;
[DllImport("user32.dll")]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
[DllImport("user32.dll")]
static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

then

IntPtr hWnd = FindWindow(null, AppName );
if (hWnd != IntPtr.Zero)
{
//Hide the window
ShowWindow(hWnd, 0); // 0 = SW_HIDE
}

I do think you should consider writing the data to a file or something though

Instead of just Process.Start(), create an instance of Process and populate the StartInfo structure so you can set the WindowStyle to Hidden:

Dim ConsoleApp As String = "C:\Users\Mike\Documents\Visual Studio 2010\Projects\ConsoleApplication2\ConsoleApplication2\bin\Debug\ConsoleApplication2.exe"

        Dim P As New Process
        P.StartInfo.FileName = ConsoleApp
        P.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
        P.Start()
        P.WaitForExit()

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Use this sample code (from MSDN)

Class MyProcess

        Public Shared Sub Main()
            Dim myProcess As New Process()

            Try               

                myProcess.StartInfo.UseShellExecute = False
                ' You can start any process, HelloWorld is an example, that writes some text
                myProcess.StartInfo.FileName = "C:\\HelloWorld.exe"
                myProcess.StartInfo.CreateNoWindow = True
                myProcess.StartInfo.RedirectStandardOutput = true;
                myProcess.Start()
                ' This code assumes the process you are starting will terminate itself. 
                ' Given that is is started without a window so you cannot terminate it 
                ' on the desktop, it must terminate itself or you can do it programmatically
                ' from this application using the Kill method.
               Dim myStreamReader As StreamReader = myProcess.StandardOutput
              ' Read the standard output of the spawned process.
              Dim myString As String = myStreamReader.ReadLine()
              Console.WriteLine(myString)

              myProcess.WaitForExit()
              myProcess.Close()
            Catch e As Exception
                Console.WriteLine((e.Message))
            End Try
        End Sub 'Main
    End Class

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http://social.msdn.microsoft.com/forums/en-US/csharpgeneral/thread/ea8b0fd5-a660-46f9-9dcb-d525cc22dcbd