FixSystemTime.au3

#include <GUIConstantsEx.au3>
#include <Date.au3>
#include <WindowsConstants.au3>
#RequireAdmin

; Under Vista the  Windows API "SetSystemTime" may be rejected due to system security

Global $iMemo

_Main()

Func _Main()
    Local $tCur, $tNew

    ; Create GUI
    GUICreate("Time", 400, 300)
    $iMemo = GUICtrlCreateEdit("", 2, 2, 396, 296, $WS_VSCROLL)
    GUICtrlSetFont($iMemo, 9, 400, 0, "Courier New")
    GUISetState()

    ; Get current system time
    $tCur = _Date_Time_GetSystemTime()
    MemoWrite("Current system date/time .: " & _Date_Time_SystemTimeToDateTimeStr($tCur))

    ; Set new system time
    $tNew = _Date_Time_EncodeSystemTime(@MON, 5, @YEAR, 12, 40, 45)
    If Not _Date_Time_SetSystemTime(DllStructGetPtr($tNew)) Then
        MsgBox(4096, "Error", "System clock cannot be SET" & @CRLF & @CRLF & _WinAPI_GetLastErrorMessage())
        Exit
    EndIf
    $tNew = _Date_Time_GetSystemTime()
    MemoWrite("New system date/time .....: " & _Date_Time_SystemTimeToDateTimeStr($tNew))

    ; Restore system time
    _Date_Time_SetSystemTime(DllStructGetPtr($tCur))

    ; Get current system time
    $tCur = _Date_Time_GetSystemTime()
    MemoWrite("Current system date/time .: " & _Date_Time_SystemTimeToDateTimeStr($tCur))

    ; Loop until user exits
    Do
    Until GUIGetMsg() = $GUI_EVENT_CLOSE

EndFunc   ;==>_Main

; Write a line to the memo control
Func MemoWrite($sMessage)
    GUICtrlSetData($iMemo, $sMessage & @CRLF, 1)
EndFunc   ;==>MemoWrite