ASM Community

This is supposed to reboot and it does but I have to manually cycle
my monitor power button to get my screen showing.
My help file said I needed a combination of the 2 flags. Guess I picked
the wrong two.

Thanks.

    .code

start:

        invoke ExitWindowsEx,1 or EWX_REBOOT,2
        invoke ExitProcess,eax

end start

        ; Flags for ExitWindowEx

        ; EWX_LOGOFF    equ 0
        ; EWX_SHUTDOWN  equ 1
        ; EWX_REBOOT    equ 2
        ; EWX_FORCE    equ 4
        ; EWX_POWEROFF  equ 8

Shutdown reason #2 is...

#define SHTDN_REASON_MINOR_INSTALLATION  00000002h

I got an assembler error using that. Here is what win32.hlp says:

(I like the "some combination" part. Like going in to a restaurant and saying "Surprise me" when they ask what you want to order. ?)

Parameters

uFlags

Specifies the type of shutdown. This parameter must be some combination of the following values:

Value Meaning
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.
dwReserved

Reserved; this parameter is ignored.

Return Values

If the function succeeds, the return value is nonzero.

See reply to Donkey.

Here's an example of a properly written system shutdown proc. It is written in GoAsm but should be easy to translate. I am not sure which one you were looking at but if it does not adjust the priviledge token it will not work for NT based versions of Windows...

LUID STRUCT
  LowPart   DD
  HighPart  DD
LUID ENDS

LUID_AND_ATTRIBUTES STRUCT
    Luid LUID         <0>
    Attributes dd
LUID_AND_ATTRIBUTES ENDS

TOKEN_PRIVILEGES STRUCT
  PrivilegeCount    DD
  Privileges        LUID_AND_ATTRIBUTES <0>
TOKEN_PRIVILEGES ENDS

CODE SECTION

SystemShutdown FRAME
	LOCAL hToken	:D
	LOCAL hProcess	:D
	LOCAL tkp	:TOKEN_PRIVILEGES
	
	// Get the token for this process
	invoke GetCurrentProcess
	mov , eax
	invoke OpenProcessToken, , TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, offset hToken
	
	lea eax,tkp.Privileges.Luid
	invoke LookupPrivilegeValue,NULL,SE_SHUTDOWN_NAME,eax
	mov D,1
	mov D,SE_PRIVILEGE_ENABLED
	invoke AdjustTokenPrivileges,, FALSE,offset tkp,0,0,0
	invoke GetLastError
	test eax,eax
	jnz >.ERROR
		invoke ExitWindowsEx,EWX_SHUTDOWN + EWX_FORCE, \
		SHTDN_REASON_MAJOR_OPERATINGSYSTEM  | SHTDN_REASON_MINOR_UPGRADE | SHTDN_REASON_FLAG_PLANNED

		RET
	.ERROR
		invoke MessageBox,0,"Error adjusting priviledge",0,0
		RET
ENDF

My motto is "if in doubt check MSDN, if there is no doubt, check it anyway" :)

Thanks for your patience. I am not familiar with GoAsm. The FastExit.asm in Hutch's package shuts down the computer. Good short code that works on 98 and presumably would also work on 95 as well. I am looking to modify it or start from scratch if I have to and make one that just reboots a WIN 98 system.

As you can see from the previous info I posted from the Win32.hlp, it's instructions on the flags are clear as mud.
It gives EWX_REBOOT as one flag so I assume that rebooting is available.

Thanks,
            Andy

Hi f0dder, this is the code from the MASM32 examples...

WndProc proc hWin   :DWORD,
             uMsg   :DWORD,
             wParam :DWORD,
             lParam :DWORD

      LOCAL Ps :PAINTSTRUCT

      .if uMsg == WM_INITDIALOG

        szText dlgTitle," Fast Shutdown"
        invoke SendMessage,hWin,WM_SETTEXT,0,ADDR dlgTitle

        invoke LoadIcon,hInstance,200
        mov hIcon, eax

        invoke SendMessage,hWin,WM_SETICON,1,hIcon

        invoke GetDlgItem,hWin,IDOK
        mov hButn1, eax

        invoke GetDlgItem,hWin,IDCANCEL
        mov hButn2, eax

        invoke GetDlgItem,hWin,3000
        mov hIwin, eax


        xor eax, eax
        ret

      .elseif uMsg == WM_COMMAND
        .if wParam == IDOK
          invoke ExitWindowsEx,EWX_SHUTDOWN or EWX_FORCE,0

          ; EWX_LOGOFF    equ 0
          ; EWX_SHUTDOWN  equ 1
          ; EWX_REBOOT    equ 2
          ; EWX_FORCE     equ 4
          ; EWX_POWEROFF  equ 8

        .elseif wParam == IDCANCEL
          jmp outa_here
        .endif

      .elseif uMsg == WM_CLOSE
        outa_here:
        invoke EndDialog,hWin,0

      .elseif uMsg == WM_PAINT
        invoke BeginPaint,hWin,ADDR Ps
      ; ----------------------------------------
      ; The following function are in MASM32.LIB
      ; ----------------------------------------
        invoke FrameGrp,hButn1,hButn2,6,1,0
        invoke FrameGrp,hIwin,hIwin,6,1,0
        invoke FrameGrp,hIwin,hIwin,3,1,1
        invoke FrameWindow,hWin,2,1,1
        invoke EndPaint,hWin,ADDR Ps
        xor eax, eax
        ret

      .endif

    xor eax, eax    ; this must be here in NT4
    ret

WndProc endp

Obviously it will not function except in Windows 9x (though it does mention NT4 for some reason) But it is more than adequate as an example of shutting down the system under the older 9x OS versions.

You guys must be more tired than myself. In my last post I said I needed it for WIN 98, NOT AN NT SYSTEM.
:-)