Synchronizate PC time

[GregL]

Here is another way to get the current offset from UTC (in minutes):

Code Select Expand


CurrentUtcOffsetInMinutes PROC

    ; Returns: eax = the current offset from UTC in minutes
    ; Example: returns -480 for Pacific Standard Time
    ;          returns -420 for Pacific Daylight Time 
    ; Gets the value from the Windows Registry at
    ;  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation\ActiveTimeBias         
   
    LOCAL hKey:DWORD
    LOCAL dwType:DWORD
    LOCAL sdwData:SDWORD
    LOCAL cbData:DWORD
   
    mov cbData, SIZEOF sdwData
    INVOKE RegOpenKeyEx, HKEY_LOCAL_MACHINE, SADD("SYSTEM\CurrentControlSet\Control\TimeZoneInformation"), 0, KEY_QUERY_VALUE, ADDR hKey
    INVOKE RegQueryValueEx, hKey, SADD("ActiveTimeBias"), NULL, ADDR dwType, ADDR sdwData, ADDR cbData
    INVOKE RegCloseKey, hKey
    mov eax, sdwData
    neg eax
    ret
   
CurrentUtcOffsetInMinutes ENDP


[herge]

Hi dsouza123:

It does work, but it is adjusting the time to Greenwich[London] [GMT] [UTC] which
is four hours ahead. I used the httpsync7.zip

[dsouza123]

The program works by combining the GMT offset setting in the computer
(which it gets using  GetTimeZoneInformation
and displays both the hour and minutes in editable fields
so you can change them, maybe you like to set your clock ahead),

along with the values converted from the text from the HEAD reply

example
GMT offset -4 00 
Date: Tue, 03 Jul 2007 23:42:44 GMT

will combine for 19:42:44 or 7:42:44 PM