Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Retrieving the User Datagram Protocol (UDP) listener table
Retrieving various system metrics
Using LoadLibrary
Using SQLBrowseConnect to connect to a data source through a number of iterative calls (SQL Server)
Disabling drawing in the VFP form
How to retrieve the number of objects stored in the Recycle Bin
Initiating Inet connection using a modem
Using an Event Object. Part A: running an application that creates an Event object
Using the FindMediaType function
Using the GetLogicalDriveStrings
Winsock: creating a socket that is bound to a specific service provider
Pocket PC: retrieving data from the Contacts Database
Power capabilities of the system: battery, UPS, sleep and hibernation modes, processor throttling
Retrieving configuration information for the specified workstation (Win2000/XP)
Converting a decimal string to an integer
How to create a service object
PocketPC: creating directories and files
Printf-style formatted text output in VFP
Reading data from INI files
Saying "Hello World!" with VFP and WinAPI
Creating two-byte hashes for a list of URLs
Displaying the color palette stored in an image file
CryptoAPI: retrieving list of providers
How to delete a service object
Retrieving information specific to the current Time Zone

User rating: 10/10 (2 votes)
Rate this code sample:
  • ~
More code examples    Listed functions    Add comment     W32 Constants      Translate this page Printer friendly version of this code sample
*| typedef struct _TIME_ZONE_INFORMATION { 
*|     LONG       Bias;                  0        4
*|     WCHAR      StandardName[ 32 ];    4       64
*|     SYSTEMTIME StandardDate;         68       16
*|     LONG       StandardBias;         84        4
*|     WCHAR      DaylightName[ 32 ];   88       64
*|     SYSTEMTIME DaylightDate;        152       16
*|     LONG       DaylightBias;        168        4
*| } TIME_ZONE_INFORMATION, *PTIME_ZONE_INFORMATION; total 172 bytes
#DEFINE TIME_ZONE_SIZE  172
DO decl

LOCAL cTimeZone, cTimeZone_, nId
cTimeZone = Repli(Chr(0), TIME_ZONE_SIZE)

? "*** Retrieving current TimeZone info..."
nId = GetTimeZoneInformation(@cTimeZone)
= ShowTimeZoneInfo(cTimeZone)

?
? "*** Changing bias and standard name parameters..."
LOCAL nNewBias, cStandardName, cDaylightName
nNewBias = 301
*cStandardName = PADR(StrConv("Scarborough Standard",5),64,Chr(0))
cStandardName = PADR("My City Standard", 64, Chr(0))
cDaylightName = PADR("My City Daylight", 64, Chr(0))
cTimeZone_ = num2dword(nNewBias) + cStandardName +;
    SUBSTR(cTimeZone, 69, 20) +;
    cDaylightName +;
    SUBSTR(cTimeZone, 153)

= SetTimeZoneInformation(cTimeZone_) && setting
cTimeZone_ = Repli(Chr(0), TIME_ZONE_SIZE)  && clearing buffer
= GetTimeZoneInformation(@cTimeZone_) && re-populating buffer
= ShowTimeZoneInfo(cTimeZone_)

?
? "*** Back to old settings..."
= SetTimeZoneInformation(cTimeZone)
cTimeZone = Repli(Chr(0), TIME_ZONE_SIZE)
= GetTimeZoneInformation(@cTimeZone)
= ShowTimeZoneInfo(cTimeZone)
* end of main

FUNCTION GetTimeZoneType(nId)
#DEFINE TIME_ZONE_ID_UNKNOWN     0
#DEFINE TIME_ZONE_ID_STANDARD    1
#DEFINE TIME_ZONE_ID_DAYLIGHT    2
    DO CASE
    CASE nId = TIME_ZONE_ID_STANDARD
        RETURN "StandardDate member"
    CASE nId = TIME_ZONE_ID_DAYLIGHT
        RETURN "DaylightDate member"
    CASE nId = TIME_ZONE_ID_UNKNOWN
        RETURN "The system cannot determine the current time zone"
    OTHER
        RETURN "The Time Zone ID is invalid"
    ENDCASE

PROCEDURE ShowTimeZoneInfo(cTimeZone)
    ? "Bias (minutes between UTC and local):", buf2dword(SUBSTR(cTimeZone, 1,4))
    ? "Standard Bias:", buf2dword(SUBSTR(cTimeZone, 85,4))
    ? "Daylight Bias:", buf2dword(SUBSTR(cTimeZone, 169,4))
    ? "Standard name:", STRTRAN(SUBSTR(cTimeZone, 5,32), Chr(0),"")
    ? "Daylight name:", STRTRAN(SUBSTR(cTimeZone, 89,32), Chr(0),"")
    ? "Standard Date:",;
        buf2word(SUBSTR(cTimeZone,69,2)),;
        buf2word(SUBSTR(cTimeZone,71,2)),;
        buf2word(SUBSTR(cTimeZone,73,2)),;
        buf2word(SUBSTR(cTimeZone,75,2)),;
        buf2word(SUBSTR(cTimeZone,77,2)),;
        buf2word(SUBSTR(cTimeZone,79,2))
    ? "Daylight Date:",;
        buf2word(SUBSTR(cTimeZone,153,2)),;
        buf2word(SUBSTR(cTimeZone,155,2)),;
        buf2word(SUBSTR(cTimeZone,157,2)),;
        buf2word(SUBSTR(cTimeZone,159,2)),;
        buf2word(SUBSTR(cTimeZone,161,2)),;
        buf2word(SUBSTR(cTimeZone,163,2))

FUNCTION buf2dword(lcBuffer)
RETURN Asc(SUBSTR(lcBuffer, 1,1)) + ;
    BitLShift(Asc(SUBSTR(lcBuffer, 2,1)),  8) +;
    BitLShift(Asc(SUBSTR(lcBuffer, 3,1)), 16) +;
    BitLShift(Asc(SUBSTR(lcBuffer, 4,1)), 24)

FUNCTION buf2word(lcBuffer)
RETURN Asc(SUBSTR(lcBuffer, 1,1)) + ;
       Asc(SUBSTR(lcBuffer, 2,1)) * 256

FUNCTION num2dword(lnValue)
#DEFINE m0  256
#DEFINE m1  65536
#DEFINE m2  16777216
    IF lnValue < 0
        lnValue = 0x100000000 + lnValue
    ENDIF
    LOCAL b0, b1, b2, b3
    b3 = Int(lnValue/m2)
    b2 = Int((lnValue - b3*m2)/m1)
    b1 = Int((lnValue - b3*m2 - b2*m1)/m0)
    b0 = Mod(lnValue, m0)
RETURN Chr(b0)+Chr(b1)+Chr(b2)+Chr(b3)

FUNCTION num2word(lnValue)
RETURN Chr(MOD(m.lnValue,256)) + CHR(INT(m.lnValue/256))

PROCEDURE decl
    DECLARE INTEGER GetTimeZoneInformation IN kernel32;
        STRING @lpTimeZoneInformation

    DECLARE INTEGER SetTimeZoneInformation IN kernel32;
        STRING lpTimeZoneInformation



User rating: 10/10 (2 votes)
Rate this code sample:
  • ~
3808 bytes  
Created: 2001-07-25 12:00:00  
Modified: 2004-06-18 16:07:56  
Visits in 7 days: 46  
Listed functions:
GetTimeZoneInformation
SetTimeZoneInformation
Printer friendly API declarations
Word Index links for this example:
Translate this page:
  Spanish    Portuguese    German    French    Italian  
FreeTranslation.com offers instant, free translations of text or web pages.
User Contributed Notes:
There are no notes on this subject.


Copyright 2001-2016 News2News, Inc. Before reproducing or distributing any data from this site please ask for an approval from its owner. Unless otherwise specified, this page is for your personal and non-commercial use. The information on this page is presented AS IS, meaning that you may use it at your own risk. Microsoft Visual FoxPro and Windows are trade marks of Microsoft Corp. All other trademarks are the property of their respective owners. 

Privacy policy
Credits: PHP (4.4.9), an HTML-embedded scripting language, MySQL (5.6.34), the Open Source standard SQL database, AceHTML Freeware Version 4, freeware HTML Editor of choice.   Hosted by Korax Online Inc.
Last Topics Visited (54.197.142.219)
5 sec.Function: 'GetWindowPlacement'
Function group: 'Window'
9 sec.Function: 'GetTextExtentPoint32'
12 sec.Example: 'Subclassing CommandButton control to create BackColor property'
16 sec.Example: 'Enumerating MIDI output devices'
21 sec.Function: 'NetScheduleJobDel'
Function group: 'Network Management'
26 sec.Function: 'FindWindow'
Function group: 'Window'
36 sec.Function: 'StartService'
40 sec.
Function group: 'Shell Lightweight Utility APIs -- misc. functions'
44 sec.
Function group: 'Error Handling'
54 sec.Example: 'How to retrieve adapter information for the local computer (including MAC address)'
Google
Advertise here!