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c++.chat - Creating a DLL for use with WScript/VB

reply Steve Topilnycky <no.spam.steve topcatcomputing.com> writes:
I need to create a simple DLL that when called, will return the time 
offset from GMT time to my local time (Eastern Standard/Daylight Time)

The code below is basically what I need, but I do not know how to make 
it work as a DLL (I.E. return the offset).

Any suggestions?	



#include "windows.h"
#include "time.h"
#include "stdio.h"

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
 int tz;
 int sOffset;
 char msg[255];
 _tzset();

 tz=_timezone;
 if (tz == 0)
	 sOffset=0;
 else
    sOffset= (tz/60)/60;
sprintf(msg,"%d, sOffset);

MessageBox(NULL,msg,"Debug message",MB_OK);
return 0;

}

-- 

Regards,

Steve Topilnycky             
Top Cat Computing
Web:  http://www.topcatcomputing.com/
Dec 13 2002
next sibling parent reply "Walter" <walter digitalmars.com> writes:
The best suggestion I can make is pick up a copy of Jeffrey Richter's book
"Advanced Windows" which should provide all the info you need on creating
DLL's. See www.digitalmars.com/bibliography.html . Amazon lists it used for
$12.50 (a bargain!).

-Walter


"Steve Topilnycky" <no.spam.steve topcatcomputing.com> wrote in message
news:MPG.186482e3b6fc4df6989683 news.digitalmars.com...

 I need to create a simple DLL that when called, will return the time
 offset from GMT time to my local time (Eastern Standard/Daylight Time)

 The code below is basically what I need, but I do not know how to make
 it work as a DLL (I.E. return the offset).

 Any suggestions?



 #include "windows.h"
 #include "time.h"
 #include "stdio.h"

 int APIENTRY WinMain(HINSTANCE hInstance,
                      HINSTANCE hPrevInstance,
                      LPSTR     lpCmdLine,
                      int       nCmdShow)
 {
  int tz;
  int sOffset;
  char msg[255];
  _tzset();

  tz=_timezone;
  if (tz == 0)
 sOffset=0;
  else
     sOffset= (tz/60)/60;
 sprintf(msg,"%d, sOffset);

 MessageBox(NULL,msg,"Debug message",MB_OK);
 return 0;

 }

 --

 Regards,

 Steve Topilnycky
 Top Cat Computing
 Web:  http://www.topcatcomputing.com/
Dec 14 2002
parent reply Steve Topilnycky <no.spam.steve topcatcomputing.com> writes:
In the c++.chat newsgroup Walter wrote: 

 

 The best suggestion I can make is pick up a copy of Jeffrey Richter's book
 "Advanced Windows"
 


Walter, Thanks!  Will do!

Happy Holidays to All!
-- 

Regards,

Steve Topilnycky             
Top Cat Computing
Web:  http://www.topcatcomputing.com/
Dec 14 2002
parent "Walter" <walter digitalmars.com> writes:
Richter's book has been an invaluable resource for my own win32 programming.
Hope you find it as useful.

"Steve Topilnycky" <no.spam.steve topcatcomputing.com> wrote in message
news:MPG.1865702468d9ac49989684 news.digitalmars.com...

 In the c++.chat newsgroup Walter wrote:



 The best suggestion I can make is pick up a copy of Jeffrey Richter's




book

 "Advanced Windows"


 Walter, Thanks!  Will do!

 Happy Holidays to All!
 --

 Regards,

 Steve Topilnycky
 Top Cat Computing
 Web:  http://www.topcatcomputing.com/
Dec 14 2002
prev sibling parent reply "Daniel Fazekas" <fds mailbox.hu> writes:
"Steve Topilnycky" <no.spam.steve topcatcomputing.com> wrote in message
news:MPG.186482e3b6fc4df6989683 news.digitalmars.com...

 I need to create a simple DLL that when called, will return the time
 offset from GMT time to my local time (Eastern Standard/Daylight Time)


Isn't VB able to call simple Win32 API funcions?
I'm sure there is a way and that would mean you have no use for a seperate
DLL.

Just use the GetTimeZoneInformation API:
http://msdn.microsoft.com/library/en-us/sysinfo/base/gettimezoneinformation.
asp

I don't know what WScript stands for though.

--
Daniel
Dec 15 2002
parent Steve Topilnycky <steve topcatcomputing.com> writes:
In the c++.chat newsgroup Daniel Fazekas wrote: 


 I don't know what WScript stands for though.


Windows Scripting Host 

 http://msdn.microsoft.com/library/default.asp?url=/library/en-us/script56/html/wsconWScri
tCScriptOptions.asp  


The function is not support via VB or WScript. At least not that I could 
find.  I use Wscript on my servers to run certain tasks.  Once of which 
is phrasing a log that is stored in GMT time, and uploading it to a 
database.  Since, here in the East Cost the offset differs between 
Daylight Savings time & Daylight Standard time, I need to create a 
utility DLL to calc the offset.

I thus far have figured out the routine, but when it returns a negative, 
I get an error from Wscript.  So I must have something declared wrong..  
Right now, my return value is a Long INT, would a DWORD be a more 
appropriate declaration? 

Does DM support Data Base connectivity via OBDC?
-- 
Regards,

Steve Topilnycky             
Top Cat Computing
Web:  http://www.topcatcomputing.com/
Dec 23 2002