Question

I created a VB.NET Windows Forms Application in Visual Studio 2008. When I run my program from the command-line, I get no output (only the next prompt).

What am I doing wrong?

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Debug.Write("Foo")
    Debug.Flush()
    Console.WriteLine("foo")
    Console.Beep(800, 100) 'confirm this function is called'
    Me.Close()
End Sub

EDIT: Can a program have a form and a console?

EDIT2: Ho’s answer works. However, the output appears on the next command-line prompt. Can a Winforms application tell the command-line to wait until it’s finished instead of immediately returning?

Answer 1

Or if you already have a WinForms application you can attach a Console to it using the AttachConsole API.

using System.Runtime.InteropServices;  

…

[DllImport("kernel32.dll")] static extern bool AttachConsole(int dwProcessId);
private const int ATTACH_PARENT_PROCESS = -1;  

…

AttachConsole(ATTACH_PARENT_PROCESS);

(Formatted as code)