C++ System Shutdown - NextGenUpdate

11-06-2011, 05:11 PM #1

s0vietstr1ke

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(adsbygoogle = window.adsbygoogle || []).push({}); I'm using Visual Studio 2010 ultimate, and I got this code right off MSDN.
It's supposed to check for permission to shut down the local computer and then shut it down:

    #include "stdafx.h"

#include <Windows.h>



#pragma comment(lib, "user32.lib")

#pragma comment(lib, "advapi32.lib")



BOOL MySystemShutdown( LPTSTR lpMsg )

{

   HANDLE hToken;              // handle to process token 

   TOKEN_PRIVILEGES tkp;       // pointer to token structure 

 

   BOOL fResult;               // system shutdown flag 

 

   // Get the current process token handle so we can get shutdown 

   // privilege. 

 

   if (!OpenProcessToken(GetCurrentProcess(), 

        TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken)) 

      return FALSE; 

 

   // Get the LUID for shutdown privilege. 

 

   LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME, 

        &tkp.Privileges[0].Luid); 

 

   tkp.PrivilegeCount = 1;  // one privilege to set    

   tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; 

 

   // Get shutdown privilege for this process. 

 

   AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, 

      (PTOKEN_PRIVILEGES) NULL, 0); 

 

   // Cannot test the return value of AdjustTokenPrivileges. 

 

   if (GetLastError() != ERROR_SUCCESS) 

      return FALSE; 

 

   // Display the shutdown dialog box and start the countdown. 

 

   fResult = InitiateSystemShutdown( 

      NULL,    // shut down local computer 

      lpMsg,   // message for user

      30,      // time-out period, in seconds 

      FALSE,   // ask user to close apps 

      TRUE);   // reboot after shutdown 

 

   if (!fResult) 

      return FALSE; 

 

   // Disable shutdown privilege. 

 

   tkp.Privileges[0].Attributes = 0; 

   AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, 

        (PTOKEN_PRIVILEGES) NULL, 0); 

 

   return TRUE; 

}

The code seems fine, but when I build the solution, I get these errors:

Error 1 error LNK2019: unresolved external symbol _WinMain@16 referenced in function ___tmainCRTStartup C:\Users\Owner\Documents\Projects\Hypster\LIBCMTD.lib(wincrt0.obj) Hypster

Error 2 error LNK1120: 1 unresolved externals C:\Users\Owner\Documents\Projects\Hypster\Debug\Hypster.exe Hypster

The program "Hypster" is supposed to shut down the computer on execution. Any ideas on what I should do?

11-06-2011, 09:01 PM #2

Pichu

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NextGenUpdate

Originally posted by s0vietstr1ke

I'm using Visual Studio 2010 ultimate, and I got this code right off MSDN.
It's supposed to check for permission to shut down the local computer and then shut it down:

    #include "stdafx.h"

#include <Windows.h>



#pragma comment(lib, "user32.lib")

#pragma comment(lib, "advapi32.lib")



BOOL MySystemShutdown( LPTSTR lpMsg )

{

   HANDLE hToken;              // handle to process token 

   TOKEN_PRIVILEGES tkp;       // pointer to token structure 

 

   BOOL fResult;               // system shutdown flag 

 

   // Get the current process token handle so we can get shutdown 

   // privilege. 

 

   if (!OpenProcessToken(GetCurrentProcess(), 

        TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken)) 

      return FALSE; 

 

   // Get the LUID for shutdown privilege. 

 

   LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME, 

        &tkp.Privileges[0].Luid); 

 

   tkp.PrivilegeCount = 1;  // one privilege to set    

   tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; 

 

   // Get shutdown privilege for this process. 

 

   AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, 

      (PTOKEN_PRIVILEGES) NULL, 0); 

 

   // Cannot test the return value of AdjustTokenPrivileges. 

 

   if (GetLastError() != ERROR_SUCCESS) 

      return FALSE; 

 

   // Display the shutdown dialog box and start the countdown. 

 

   fResult = InitiateSystemShutdown( 

      NULL,    // shut down local computer 

      lpMsg,   // message for user

      30,      // time-out period, in seconds 

      FALSE,   // ask user to close apps 

      TRUE);   // reboot after shutdown 

 

   if (!fResult) 

      return FALSE; 

 

   // Disable shutdown privilege. 

 

   tkp.Privileges[0].Attributes = 0; 

   AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, 

        (PTOKEN_PRIVILEGES) NULL, 0); 

 

   return TRUE; 

}

The code seems fine, but when I build the solution, I get these errors:

Error 1 error LNK2019: unresolved external symbol _WinMain@16 referenced in function ___tmainCRTStartup C:\Users\Owner\Documents\Projects\Hypster\LIBCMTD.lib(wincrt0.obj) Hypster

Error 2 error LNK1120: 1 unresolved externals C:\Users\Owner\Documents\Projects\Hypster\Debug\Hypster.exe Hypster

The program "Hypster" is supposed to shut down the computer on execution. Any ideas on what I should do?

Did you just Copy and Paste the code into your project? MSDN gives you a good idea as to how it would function but never the copy and paste.

11-08-2011, 06:40 AM #3

Docko412

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NextGenUpdate

Originally posted by s0vietstr1ke

I'm using Visual Studio 2010 ultimate, and I got this code right off MSDN.
It's supposed to check for permission to shut down the local computer and then shut it down:

    #include "stdafx.h"

#include <Windows.h>



#pragma comment(lib, "user32.lib")

#pragma comment(lib, "advapi32.lib")



BOOL MySystemShutdown( LPTSTR lpMsg )

{

   HANDLE hToken;              // handle to process token 

   TOKEN_PRIVILEGES tkp;       // pointer to token structure 

 

   BOOL fResult;               // system shutdown flag 

 

   // Get the current process token handle so we can get shutdown 

   // privilege. 

 

   if (!OpenProcessToken(GetCurrentProcess(), 

        TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken)) 

      return FALSE; 

 

   // Get the LUID for shutdown privilege. 

 

   LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME, 

        &tkp.Privileges[0].Luid); 

 

   tkp.PrivilegeCount = 1;  // one privilege to set    

   tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; 

 

   // Get shutdown privilege for this process. 

 

   AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, 

      (PTOKEN_PRIVILEGES) NULL, 0); 

 

   // Cannot test the return value of AdjustTokenPrivileges. 

 

   if (GetLastError() != ERROR_SUCCESS) 

      return FALSE; 

 

   // Display the shutdown dialog box and start the countdown. 

 

   fResult = InitiateSystemShutdown( 

      NULL,    // shut down local computer 

      lpMsg,   // message for user

      30,      // time-out period, in seconds 

      FALSE,   // ask user to close apps 

      TRUE);   // reboot after shutdown 

 

   if (!fResult) 

      return FALSE; 

 

   // Disable shutdown privilege. 

 

   tkp.Privileges[0].Attributes = 0; 

   AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, 

        (PTOKEN_PRIVILEGES) NULL, 0); 

 

   return TRUE; 

}

The code seems fine, but when I build the solution, I get these errors:

Error 1 error LNK2019: unresolved external symbol _WinMain@16 referenced in function ___tmainCRTStartup C:\Users\Owner\Documents\Projects\Hypster\LIBCMTD.lib(wincrt0.obj) Hypster

Error 2 error LNK1120: 1 unresolved externals C:\Users\Owner\Documents\Projects\Hypster\Debug\Hypster.exe Hypster

The program "Hypster" is supposed to shut down the computer on execution. Any ideas on what I should do?

may i ask why you didn't just use system("shutdown");?

or are you trying to do something else.