Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
using System;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
using System.Runtime.InteropServices;
using System.Windows.Threading;
class Program
{
// DESKTOP_ACCESS
const UInt32 DESKTOP_NONE = 0x0000u;
const UInt32 DESKTOP_READOBJECTS = 0x0001u;
const UInt32 DESKTOP_CREATEWINDOW = 0x0002u;
const UInt32 DESKTOP_CREATEMENU = 0x0004u;
const UInt32 DESKTOP_HOOKCONTROL = 0x0008u;
const UInt32 DESKTOP_JOURNALRECORD = 0x0010u;
const UInt32 DESKTOP_JOURNALPLAYBACK = 0x0020u;
const UInt32 DESKTOP_ENUMERATE = 0x0040u;
const UInt32 DESKTOP_WRITEOBJECTS = 0x0080u;
const UInt32 DESKTOP_SWITCHDESKTOP = 0x0100u;
const UInt32 dwDesiredAccess =
DESKTOP_READOBJECTS |
DESKTOP_CREATEWINDOW |
DESKTOP_CREATEMENU |
DESKTOP_WRITEOBJECTS |
DESKTOP_SWITCHDESKTOP;
[DllImport("kernel32.dll")] static extern uint GetCurrentThreadId();
[DllImport("user32.dll")] static extern IntPtr GetThreadDesktop(uint dwThreadId);
[DllImport("user32.dll")] static extern IntPtr CreateDesktop(string desktopName, IntPtr device, IntPtr deviceMode, uint flags, uint accessMask, IntPtr attributes);
[DllImport("user32.dll")] static extern bool SetThreadDesktop(IntPtr hDesktop);
[DllImport("user32.dll")] static extern bool CloseDesktop(IntPtr hDesktop);
[DllImport("user32.dll")] static extern bool SwitchDesktop(IntPtr hDesktop);
[STAThread]
public static void Main()
{
var btn = new Button() { Content = "Open secure desktop" };
btn.Click += (s, e) => SecureDialog();
var win = new Window() { Content = btn };
new Application().Run(win);
}
static void SecureDialog()
{
var hOldDesktop = GetThreadDesktop(GetCurrentThreadId());
var hNewDesktop = CreateDesktop("My desktop", IntPtr.Zero, IntPtr.Zero, 0, dwDesiredAccess, IntPtr.Zero);
SwitchDesktop(hNewDesktop);
var thread = new Thread( () => SecureDesktopThread(hNewDesktop) );
thread.SetApartmentState(ApartmentState.STA);
thread.Start();
thread.Join(); // Wait for thread to complete.
SwitchDesktop(hOldDesktop);
CloseDesktop(hNewDesktop);
}
static void SecureDesktopThread(IntPtr hNewDesktop)
{
SetThreadDesktop(hNewDesktop);
SynchronizationContext.SetSynchronizationContext(
new DispatcherSynchronizationContext(Dispatcher.CurrentDispatcher));
var win = new Window() { Content = "Hello World!", FontSize=30 };
win.ShowDialog();
Dispatcher.CurrentDispatcher.InvokeShutdown();
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.