windows shutdown

[tougo]

i used these fuctions so as to enable log off /reboot and shutdown through my program but it seems that only log off is fuctioning. why is that? even if i force a shutdown it still just logs off... (windows 2000)..if it has to do with the windows authoring and permissions how can i bypass them?

void __fastcall TForm1::Logoff1Click(TObject *Sender)
{
ExitWindowsEx(EWX_LOGOFF, 0);
}
//----------------------------------------------------------

void __fastcall TForm1::Reboot1Click(TObject *Sender)
{
ExitWindowsEx(EWX_REBOOT, 0);
}
//----------------------------------------------------------

void __fastcall TForm1::Shutdown1Click(TObject *Sender)
{
ExitWindowsEx(EWX_POWEROFF, 0);
}
//-------------

 

[cjtaylor]

You have probably figured this out by now, but if you haven't here what I had to do to shutdown. You need to set a "Token Privilege" then call the shutdown. In this example I force all the open apps to close. If you don't want to force them use EWX_SHUTDOWN. If your system supports the power-off feature, the power is also turned off.

HANDLE hToken;
TOKEN_PRIVILEGES tkp;

// Get a token for this process.
if (!OpenProcessToken(GetCurrentProcess(),
TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
ShowMessage("OpenProcessToken"

// Get the LUID for the 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 the 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)
ShowMessage("AdjustTokenPrivileges"

// Shut down the system and force all applications to close.
if (!ExitWindowsEx(EWX_SHUTDOWN | EWX_FORCE, 0))
ShowMessage("ExitWindowsEx"