Windows C + + implements logoff, restart, shutdown logoff reboot shutdown

Implementing this functionality is simple, and it is important to call a system API

ExitWindowsEx

The function is to log off the current user, shut down the system, or reboot the system.

It will send a wm_queryendsession message to all the applications and let them decide whether it can be closed.

Function Prototypes:

1. <span style="font-size:18px;">BOOL WINAPI ExitWindowsEx(
2. __in UINT uFlags,
3. __in DWORD dwReason
4. );
5. </span>

The first parameter is the closing type and the second is the reason for the shutdown

The first parameter can be:

Ewx_logoff
0

Ewx_poweroff
0x00000008

Ewx_reboot
0x00000002

Ewx_restartapps
0x00000040

Ewx_shutdown
0x00000001

This parameter can also optionally contain the following two values

Ewx_force
0X00000004 contains this parameter to force the system to shut down, which may cause the application to lose data

Ewx_forceifhung
0x00000010

if the application process still does not respond to wm_queryendsession or wm_endsession messages after the timeout period, then force them off.

return Value:

If successful, returns a value other than 0, failure returns 0

More error messages can be obtained by GetLastError ().

In addition to understanding this function, we should also be clear:

For Windows NT versions of the operating system, we need to elevate a se_shutdown permission to complete the shutdown operation.

NT is not required, for example 95,98,me

The above NT systems include:

Microsoft Windows $ (Windows NT 5.0) (1999) (2000-2010) Microsoft Windows XP (Windows NT 5.1) (2001-2014) Microsoft Win Dows Server 2003 (Windows NT 5.2) (2003-2015) Microsoft Windows Server 2003 R2 (Windows NT 5.2) (2006-2015) Microsoft Wind OWS Vista (Windows NT 6.0) (2006-2017) Microsoft Windows Server (Windows NT 6.0) (2008-2018) Microsoft Windows 7 (Win dows NT 6.1) (2009-2020)

Let's start with a concrete implementation:

Shutdown function Implementation

1. Check the system version to see if it is NT above, if yes, to elevate permissions

2. Call the system api,exitwindowsex.

2. #pragma region 功能实现
4. BOOL ReSetWindows(DWORD dwFlags,BOOL bForce)
6. {
8. //检查参数是否正确
10. if(dwFlags!=EWX_LOGOFF&&dwFlags!=EWX_REBOOT&&dwFlags!=EWX_SHUTDOWN)
12. return FALSE;
14. //获得系统的版本信息，让我们后面确定是否需要提升系统权限
16. OSVERSIONINFO osvi={0};
18. //获得参数的大小，以提供给GetVersionEx来判断这是一个新版本的OSVERSIONINFO，还是旧版本的
20. //新版本是OSVERSIONINFOEX。扩充版本
22. osvi.dwOSVersionInfoSize=sizeof(OSVERSIONINFO);
24. if(!GetVersionEx(&osvi))
26. {
28. return FALSE;
30. }
32. //检查操作系统的版本，如果是NT类型的系统，需要提升系统权限
34. if(osvi.dwPlatformId==VER_PLATFORM_WIN32_NT)
36. {
38. //EnableShutDownPriv();
40. }
42. //判断是否是强制关机，强制关闭系统进程。
44. dwFlags|=(bForce!=FALSE)?EWX_FORCE:EWX_FORCEIFHUNG;
46. //调用API
48. returnExitWindowsEx(dwFlags,0);
50. }

code to elevate permissions:

2. #pragma region 用来提升系统权限
4. //这是一个通用的提升权限函数，如果需要提升其他权限
6. //更改LookupPrivilegeValue的第二个参数SE_SHUTDOWN_NAME，即可
8. BOOL EnableShutDownPriv()
10. {
12. HANDLE hToken=NULL;
14. TOKEN_PRIVILEGES tkp={0};
16. //打开当前程序的权限令牌
18. if(!OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY,&hToken))
20. {
22. return FALSE;
24. }
26. //获得某一特定权限的权限标识LUID，保存在tkp中
28. if(!LookupPrivilegeValue(NULL,SE_SHUTDOWN_NAME,&tkp.Privileges[0].Luid))
30. {
32. CloseHandle(hToken);
34. return FALSE;
36. }
38. tkp.PrivilegeCount=1;
40. tkp.Privileges[0].Attributes=SE_PRIVILEGE_ENABLED;
42. //调用AdjustTokenPrivileges来提升我们需要的系统权限
44. if(!AdjustTokenPrivileges(hToken,FALSE,&tkp,sizeof(TOKEN_PRIVILEGES),NULL,NULL))
46. {
48. CloseHandle(hToken);
50. return FALSE;
52. }
54. return TRUE;
56. }

Call Method:

1. ReSetWindows(EWX_LOGOFF,false);//注销
2. ReSetWindows(EWX_REBOOT,true);//重启
3. ReSetWindows(EWX_SHUTDOWN,true);//关机

See your code for details, see attachment. Article excerpt from:http://blog.csdn.net/zy_dreamer/article/details/8948880

Null

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Windows C + + implements logoff, restart, shutdown logoff reboot shutdown