怎么用程序实现Ctrl+Alt+Del三键同时按下的效果？

[DryFisHH]

rt

[fireseed]

sendmessage keydown

[jerry]

Ctrl+Alt+Del 是不能通过代码模拟出来的, 这是WINDOWS 专有的.

[xyw2278]

大概不行

[fireseed]

int WlxLoggedOnSAS( pWlxContext,WLX_SAS_TYPE_CTRL_ALT_DEL, NULL);

[truewill]

似乎很多远程控制的软件都能发这个功能的哦

[OnlyHappy]

不会吧.我想不能

[DryFisHH]

那么，象一些远程控制软件利用其他的组合键，比如ctrl+alt+F12，来使远程产生Ctrl+Alt+Del 事件，是怎么实现的？

我模拟三键相继按下的事件 key_event（VK_CONTROL, ..）;key_event（VK_MENU, ..）;key_event（VK_DELETE, ..）,这样好像不行，这又是为何？

[luolovegui]

同意：Ctrl+Alt+Del 是不能通过代码模拟出来的, 这是WINDOWS 专有的.

[DryFisHH]

呵呵，我找到答案了，贴出来，给那些有着相同问题的人看。


注意
：OpenDesktop("Winlogon", ......)本身需要LocalSystem权限，否则会返回“拒绝访问”错误（错误代码5）。

/*********************************************************************
// COMPANY : RABCO SYSTEM
// AUTHOR : SUKANTA KUMAR DASH
// DATE : 21.01.2003
/////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2003 by Sukanta Kumar Dash ,Rabco systems , India
// All rights reserved
//
// Distribute freely, except: don't remove my name from the source or
// documentation (don't take credit for my work), mark your changes (don't
// get me blamed for your possible bugs), don't alter or remove this
// notice.
// No warrantee of any kind, express or implied, is included with this
// software; use at your own risk, responsibility for damages (if any) to
// anyone resulting from the use of this software rests entirely with the
// user.
//
// Send bug reports, bug fixes, enhancements, requests, flames, etc., and
// I'll try to keep a version up to date. I can be reached as follows:
// [e-mail]
/////////////////////////////////////////////////////////////////////////////
*/
#include "windows.h"
BOOL simulateAltControlDel();
void main()
{
simulateAltControlDel();
}
BOOL simulateAltControlDel()
{
HDESK hdeskCurrent;
HDESK hdesk;
HWINSTA hwinstaCurrent;
HWINSTA hwinsta;
//
// Save the current Window station
//
hwinstaCurrent = GetProcessWindowStation();
if (hwinstaCurrent == NULL)
return FALSE;
//
// Save the current desktop
//
hdeskCurrent = GetThreadDesktop(GetCurrentThreadId());
if (hdeskCurrent == NULL)
return FALSE;
//
// Obtain a handle to WinSta0 - service must be running
// in the LocalSystem account
//
hwinsta = OpenWindowStation("winsta0", FALSE,
WINSTA_ACCESSCLIPBOARD |
WINSTA_ACCESSGLOBALATOMS |
WINSTA_CREATEDESKTOP |
WINSTA_ENUMDESKTOPS |
WINSTA_ENUMERATE |
WINSTA_EXITWINDOWS |
WINSTA_READATTRIBUTES |
WINSTA_READSCREEN |
WINSTA_WRITEATTRIBUTES);
if (hwinsta == NULL)
return FALSE;
//
// Set the windowstation to be winsta0
//
if (!SetProcessWindowStation(hwinsta))
return FALSE;

//
// Get the default desktop on winsta0
//
hdesk = OpenDesktop("Winlogon", 0, FALSE,
DESKTOP_CREATEMENU |
DESKTOP_CREATEWINDOW |
DESKTOP_ENUMERATE |
DESKTOP_HOOKCONTROL |
DESKTOP_JOURNALPLAYBACK |
DESKTOP_JOURNALRECORD |
DESKTOP_READOBJECTS |
DESKTOP_SWITCHDESKTOP |
DESKTOP_WRITEOBJECTS);
if (hdesk == NULL)
return FALSE;

//
// Set the desktop to be "default"
//
if (!SetThreadDesktop(hdesk))
return FALSE;
PostMessage(HWND_BROADCAST,WM_HOTKEY,0,MAKELPARAM(MOD_ALT|MOD_CONTROL,VK_DELETE));


//
// Reset the Window station and desktop
//
if (!SetProcessWindowStation(hwinstaCurrent))
return FALSE;

if (!SetThreadDesktop(hdeskCurrent))
return FALSE;

//
// Close the windowstation and desktop handles
//
if (!CloseWindowStation(hwinsta))
return FALSE;
if (!CloseDesktop(hdesk))
return FALSE;
return TRUE;
}

[koko1998]

VC知识库文章 - WINDOWS NT-2000下如何屏蔽CTRL+ALT+DEL.htm
VC知识库文章 - Windows XP系统中如何屏蔽 Ctrl+Alt+Del、Alt+Tab以及Ctrl+Esc键序列.htm

在网上看看上面两篇文章，看看有没有帮助!

[wshcdr]

偶这里不行

OpenDesktop

返回NULL