ExitWindow(...)MSDN说明:It sends the WM_QUERYENDSESSION message to determine if they can be terminated.Expamle: // Log off the current user. ExitWindows(0, 0); // Process the message in the application's window procedure. case WM_QUERYENDSESSION: { int r; r = MessageBox(NULL, "Shut down?","WM_QUERYENDSESSION", MB_YESNO);
// Return TRUE to allow shutdown, FALSE to stop.
return r == IDYES; break; }
You can use the ExitWindowsEx function to shut down the system. Shutting down flushes file buffers to disk and brings the system to a condition in which it is safe to turn off the computer. Windows NT/2000/XP: The following example enables the SE_SHUTDOWN_NAME privilege and then shuts down the system. HANDLE hToken; TOKEN_PRIVILEGES tkp;
// Get a token for this process.
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken)) error("OpenProcessToken");
// Log off the current user.
ExitWindows(0, 0);
// Process the message in the application's window procedure.
case WM_QUERYENDSESSION:
{
int r;
r = MessageBox(NULL, "Shut down?","WM_QUERYENDSESSION", MB_YESNO);
// Return TRUE to allow shutdown, FALSE to stop.
return r == IDYES;
break;
}
TOKEN_PRIVILEGES tkp;
// Get a token for this process.
if (!OpenProcessToken(GetCurrentProcess(),
TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
error("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)
error("AdjustTokenPrivileges");
// Shut down the system and force all applications to close.
if (!ExitWindowsEx(EWX_SHUTDOWN | EWX_FORCE, 0))
error("ExitWindowsEx");
For more information about setting security privileges, see Privileges.