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using System;
using System.Collections;
using System.Runtime.InteropServices;
using System.IO;
using System.Text;
using Microsoft.Win32.SafeHandles;
namespace Windows
{
class GuiConsole
{
public static void CreateConsole()
{
if (hasConsole)
return;
if (oldOut == IntPtr.Zero)
oldOut = GetStdHandle( -11 );
if (! AllocConsole())
throw new Exception("AllocConsole() failed");
conOut = CreateFile( "CONOUT$", 0x40000000, 2, IntPtr.Zero, 3, 0, IntPtr.Zero );
if (! SetStdHandle(-11, conOut))
throw new Exception("SetStdHandle() failed");
StreamToConsole();
hasConsole = true;
}
public static void ReleaseConsole()
{
if (! hasConsole)
return;
if (! CloseHandle(conOut))
throw new Exception("CloseHandle() failed");
conOut = IntPtr.Zero;
if (! FreeConsole())
throw new Exception("FreeConsole() failed");
if (! SetStdHandle(-11, oldOut))
throw new Exception("SetStdHandle() failed");
StreamToConsole();
hasConsole = false;
}
private static void StreamToConsole()
{
Stream cstm = Console.OpenStandardOutput();
StreamWriter cstw = new StreamWriter( cstm, Encoding.Default );
cstw.AutoFlush = true;
Console.SetOut( cstw );
Console.SetError( cstw );
}
private static bool hasConsole = false;
private static IntPtr conOut;
private static IntPtr oldOut;
[DllImport("kernel32.dll", SetLastError=true)]
private static extern bool AllocConsole();
[DllImport("kernel32.dll", SetLastError=false)]
private static extern bool FreeConsole();
[DllImport("kernel32.dll", SetLastError=true)]
private static extern IntPtr GetStdHandle( int nStdHandle );
[DllImport("kernel32.dll", SetLastError=true)]
private static extern bool SetStdHandle(int nStdHandle, IntPtr hConsoleOutput);
[DllImport("kernel32.dll", CharSet=CharSet.Auto, SetLastError=true)]
private static extern IntPtr CreateFile(
string fileName,
int desiredAccess,
int shareMode,
IntPtr securityAttributes,
int creationDisposition,
int flagsAndAttributes,
IntPtr templateFile );
[DllImport("kernel32.dll", ExactSpelling=true, SetLastError=true)]
private static extern bool CloseHandle(IntPtr handle);
}
}