settime=23:23:23.45
ADDRESS 'cmd'
'time' settime

OPTIONS "C_CALL"
systemtime = "32u, 32u, 32u, 32u, 32u, 32u, 32u, 32u"
FUNCDEF("SetSystemTime", "32, struct SYSTEMTIME", "kernel32")
FUNCDEF("GetSystemTime", ", struct SYSTEMTIME stor", "kernel32")

/*
SystemTime.1 is the current year.
SystemTime.2 is the current month, where January = 1, February = 2, and so on. 
SystemTime.3 is the current day of the week, where Sunday = 0, Monday = 1, and so on. This is ignored by SetSystemTime, but will be set by GetSystemTime.
SystemTime.4 is the current day of the month.
SystemTime.5 is the current hour (of a 24 hour clock).
SystemTime.6 is the current minute.
SystemTime.7 is the current second.
SystemTime.8 is the current millisecond.
*/

getsystemtime(systemtime)

/* Change fields as you see fit, for example, maybe the hour and minute */

systemtime.5 = 0
systemtime.6 = 0

/* Set the new time */
setsystemtime(systemtime)