Information: Exiting Windows

This may come to a shock to most of you, but the function to exit windows is.. YES, ExitWindows()

Code:

The ExitWindows function logs the current user off. 

BOOL ExitWindows(

    DWORD dwReserved,	// reserved 
    UINT uReserved 	// reserved 
   );

There is an ExitWindowsEx() function too.

Code:

The ExitWindowsEx function either logs off, shuts down, or shuts down and restarts the system. 

BOOL ExitWindowsEx(

    UINT uFlags,	// shutdown operation
    DWORD dwReserved 	// reserved
   );

the flags are:

EWX_FORCE Forces processes to terminate. When this flag is set, Windows does not send the messages WM_QUERYENDSESSION and WM_ENDSESSION to the applications currently running in the system. This can cause the applications to lose data. Therefore, you should only use this flag in an emergency.

EWX_LOGOFF Shuts down all processes running in the security context of the process that called the ExitWindowsEx function. Then it logs the user off.

EWX_POWEROFF Shuts down the system and turns off the power. The system must support the power-off feature.Windows NT: The calling process must have the SE_SHUTDOWN_NAME privilege. For more information, see the following Remarks section. Windows 95: Security privileges are not supported or required.

EWX_REBOOT Shuts down the system and then restarts the system. Windows NT: The calling process must have the SE_SHUTDOWN_NAME privilege. For more information, see the following Remarks section. Windows 95: Security privileges are not supported or required.

EWX_SHUTDOWN Shuts down the system to a point at which it is safe to turn off the power. All file buffers have been flushed to disk, and all running processes have stopped. Windows NT: The calling process must have the SE_SHUTDOWN_NAME privilege. For more information, see the following Remarks section. Windows 95: Security privileges are not supported or required.

Hope that helps you, (none of you probly cared, but.. OH WELL!)

[EDIT]Tried by best to make the flags readable[/EDIT]

Here is the source code to shut down the computer for Windows NT/2000/XP

Code:

#include "windows.h"
#include "iostream.h"






int main(int argc, char* argv[])
{
	TOKEN_PRIVILEGES tkp;
	HANDLE hToken;
	OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY,&hToken); //We now have a Token for this Process.
	//Now we must find the LUID ###'s for Shutting down the computer in Windows NT.
	LookupPrivilegeValue(NULL,SE_SHUTDOWN_NAME,&tkp.Privileges[0].Luid); //Should now have the LUID Stored in our Privilege.
	//Must set the privilege count.
	tkp.PrivilegeCount = 1; //We are only setting one privilege for now.
	tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; //Set this Privilege to Enabled. Otherwise it would disable it.
	AdjustTokenPrivileges(hToken,FALSE,&tkp,0,NULL,0);
	if (GetLastError() != ERROR_SUCCESS)
	{
		cout<<"Failed To Set Privileges";
	}
	ExitWindowsEx(EWX_SHUTDOWN | EWX_POWEROFF, NULL);
	if (GetLastError() != ERROR_SUCCESS)
	{
		cout<<"Failed to shut down computer using forced attributes.";
	}
return 0;
}

The attributes are not forced, but you can add EWX_FORCE constant to force the shutdown of applications.

Yep, see you are using the ExitWindowsEx() function