请问如何修改系统时间？用什么函数？

Question

BOOL SetSystemTime(    CONST SYSTEMTIME *lpSystemTime  // address of system time to set 
   );

Answer 1

同意GreensPan(GreensPan) 
  SetLocalTime();

Answer 2

var
  MyDateTime:TDateTime;
  SysTime:TSystemTime;
begin
  MyDateTime:=.....;
  LocalTimeToSystemTime(MyDateTime,SysTime);
  SetLocalTime(SysTime);
end;

Answer 3

var
  MyDateTime:TDateTime;
  SysTime:TSystemTime;
begin
  MyDateTime:=.....;
  DateTimeToSystemTime(MyDateTime,SysTime);
  SetLocalTime(SysTime);
end;

Answer 4

var systime:Tsystemtime;systime.wYear:=2002;
.....
setsystemtime(systime);