C / C++ / MFC Discussion Boards

Roger Allen24-Apr-03 7:12

24-Apr-03 7:12

If you need a DC in OnPreparePrinting(), you can get one for the default printer for your application by doing:

AfxGetApp()->GetPrinterDC();

I cover the topic in my article Printing Tricks And Tips[^]

It should be of help.

Roger Allen
Sonork 100.10016

Were you different as a kid? Did you ever say "Ooohhh, shiny red" even once? - Paul Watson 11-February-2003

finding directory/folder path

Anonymous24-Apr-03 2:08

Anonymous

24-Apr-03 2:08

how to get just the folders path like the app wizard does
-julian

Re: finding directory/folder path

David Crow24-Apr-03 5:38

David Crow

24-Apr-03 5:38

What do you mean by the folders path?

formating date and time

Anonymous24-Apr-03 1:49

Anonymous

24-Apr-03 1:49

Hi

i have the following bit of code which i use to pull
the 'date_in' field from my database, using ado

variant v_Time_Issued
vTime_Issued = cpSet->GetCollect(L"date_in");

date_in has the value 2003-04-22 10:19:18.000

i need to be able to format the vTime_Issued so that im just left with the
time

so all i want from date_in is 10:19

any ideas ?????

Si

Re: formating date and time

fabjoe24-Apr-03 2:21

fabjoe

24-Apr-03 2:21

You can create a COleDateTime with the vTime_Issued and then you can use the member function GetDay() and GetHour() to extract the required info.
Bye

Re: formating date and time

fabjoe24-Apr-03 2:21

fabjoe

24-Apr-03 2:21

You can create a COleDateTime with the vTime_Issued and then you can use the member function GetMinute() and GetHour() to extract the required info.
Bye

Re: formating date and time

Jason Henderson24-Apr-03 5:30

Jason Henderson

24-Apr-03 5:30

Use COleDateTime in your app or modify the SQL getting the date_in from the database to only show the time.

Jason Henderson

My articles

"The best argument against democracy is a five-minute conversation with the average voter." - Winston Churchill

Re: formating date and time

David Crow24-Apr-03 5:46

David Crow

24-Apr-03 5:46

If you are using MFC, read on.

COleDateTime datetime;<br />
// ParseDateTime() is passed a null-terminated string (which you would extract from v_Time_Issued)<br />
datetime.ParseDateTime("2003-04-22 10:19:18.000");<br />
TRACE("%s\n", datetime.Format("%H:%M"));

make user interface

acaselli24-Apr-03 1:48

acaselli

24-Apr-03 1:48

I’ll like to do, in Microsoft Visual C++, a user interface for W2000 OS with meters, button, indicators etc. self-made, same LabView interface.
Where I can find free tutorials, sample or book on this argument?

Thank you, Andrea. Smile | :)

acaselli@rolandeur.com

Re: make user interface

David Crow24-Apr-03 5:48

David Crow

24-Apr-03 5:48

You want to make a UI for Windows 2000? I'm not sure I understand what you want.

Re: make user interface

acaselli5-May-03 1:43

acaselli

5-May-03 1:43

I need to write a programm to visualize, for example, a fan that rotate with the indication of rpm (revolutions per minute), an analogic tachometer with the
needle, or a thermometer whit the column of mercury and a seven segment display. I know the article "Analog Meter Class" by Mark C. Malburg, but I'll like study in depth the argument.

Thank you, Andrea.

Question about Time Zone.

George224-Apr-03 0:12

George2

24-Apr-03 0:12

Hi, everyone!

When reading the following codes and after referencing the help of
TIME_ZONE_INFORMATION and GetTimeZoneInformation in MSDN. I
find I can hardly understand the meaning of the two data
structures. What puzzled me most is what means "DaylightDate" and
"StandardDate". So I want to know whether there are some tutorials
about this topic which is easy to understand?

Codes:
--------
TIME_ZONE_INFORMATION tzi;
int nTZBias;
if (GetTimeZoneInformation(&tzi) == TIME_ZONE_ID_DAYLIGHT)
{
nTZBias = tzi.Bias + tzi.DaylightBias;
}
else
{
nTZBias = tzi.Bias;
}
--------

Thanks in advance,
George

Re: Question about Time Zone.

Rage24-Apr-03 0:55

Rage

24-Apr-03 0:55

In some countries, one hour is added or removed depending on the current season. For example, in France, we have GMT+1 in summer and GMT+2 in winter. This is supposed to spare some energy to fit work hours with daylight, but it is very controversal.
So the Standard Date is the date when the time is actually set to your local time (which depends on your location on the planet). The Daylightdate is the date when the time is actually increased with an offset (usually 60 minutes) which can be negative.

On these two dates, Windows automatically updates the system time using whether the standard bias or the daylightbias. It also prompts the user on startup to let him know about it.

If you're not concerned about changing hours according to seasons, simply do not use the daylightdate.

Another word about the strings : these are simple info strings, nothing is really done with tehm, so you can put in them everything you want.

Hope this helps.

~RaGE();

Re: Question about Time Zone.

jhwurmbach24-Apr-03 1:28

jhwurmbach

24-Apr-03 1:28

Rage wrote:
. For example, in France, we have GMT+1 in summer and GMT+2 in winter.

Isn't it the other way 'round?
GMT+1 in Winter and GMT+2 in Summer?

My opinions may have changed, but not the fact that I am right.

Re: Question about Time Zone.

Rage24-Apr-03 2:10

Rage

24-Apr-03 2:10

I wrote it the other way round, then corrected it. Honestly, I think you're right. Anyway, I guess even if I had written it right, someone would have wondered if it were not the contrary Laugh | :laugh:

~RaGE();

Re: Question about Time Zone.

George224-Apr-03 2:30

George2

24-Apr-03 2:30

Hi, Rage buddy!

I have another question, I have referenced that
function "GetTimeZoneInformation" return value can
be TIME_ZONE_ID_UNKNOWN, TIME_ZONE_ID_STANDARD and
TIME_ZONE_ID_DAYLIGHT. I want to know why sometimes
it is TIME_ZONE_ID_DAYLIGHT and why sometimes it is
TIME_ZONE_ID_STANDARD? By what the return value is
determined?

Can you show me an example?

Thanks in advance,
George

Re: Question about Time Zone.

Rage24-Apr-03 5:12

Rage

24-Apr-03 5:12

George2 wrote:
By what the return value is
determined?

MSDN

Return Values
If the function succeeds, the return value is one of the following values: 

Value Meaning 
TIME_ZONE_ID_UNKNOWN The system cannot determine the current time zone. This error is also returned if you call the SetTimeZoneInformation function and supply the bias values but no transition dates. 
Windows NT: This value is returned if daylight savings time is not used in the current time zone, because there are no transition dates. 
 
TIME_ZONE_ID_STANDARD The system is operating in the range covered by the StandardDate member of the TIME_ZONE_INFORMATION structure. 
Windows 95: This value is returned if daylight savings time is not used in the current time zone, because there are no transition dates. 
 
TIME_ZONE_ID_DAYLIGHT The system is operating in the range covered by the DaylightDate member of the TIME_ZONE_INFORMATION structure. 


If the function fails, the return value is TIME_ZONE_ID_INVALID. To get extended error information, call GetLastError.

So, the return value tells you if the system time is currently the standard one or the daylight one. If your system date is between SYSTEMTIME DayLightDay and SYSTEMTIME StandardDate, it will return you TIME_ZONE_ID_DAYLIGHT. If your system date is between SYSTEMTIME StandardDate and SYSTEMTIME DayLightDay it will return you TIME_ZONE_ID_STANDARD. (Maybe that's the other way round, but I think you have got the idea, now). The SYSTEMTIME I'm talking about are the one retrieved with GetTimeZoneInformation()

~RaGE();

Re: Question about Time Zone.

George224-Apr-03 18:40

George2

24-Apr-03 18:40

Thanks, Rage buddy!

George

Re: Question about Time Zone.

George224-Apr-03 1:34

George2

24-Apr-03 1:34

Thanks, Rage buddy!

George

lnk2019

Brian Delahunty23-Apr-03 23:57

Brian Delahunty

23-Apr-03 23:57

Hey Lads,

Just trying touse IsPwrHibernateAllowed(). The files all compile fine but gives me LNK2019 error when it tries to link. The function is in the header file Powrprof.h and this works fine in VS 6 [Well it did for me before. Don't have VS 6 installed on this machine]

Any ideas??

I'm using VS.NET 2003

error

error LNK2019: unresolved external symbol "unsigned char __stdcall IsPwrHibernateAllowed(void)" (?IsPwrHibernateAllowed@@YGEXZ) referenced in function "private: void __thiscall CShutdownManagerDlg::CheckStates(void)" (?CheckStates@CShutdownManagerDlg@@AAEXXZ)

Regards,
Brian Dela Smile | :)

Re: lnk2019

Dominik Reichl24-Apr-03 2:02

Dominik Reichl

24-Apr-03 2:02

Try linking to Powrprof.lib.

Big Grin | :-D

-Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??

Re: lnk2019

Brian Delahunty24-Apr-03 3:35

Brian Delahunty

24-Apr-03 3:35

Thanks for the advice Dominik. I had already tried that but it doesn't make a difference.

Regards,
Brian Dela Smile | :)

Transparent Docking Bars

Richard Hudson23-Apr-03 22:54

Richard Hudson

23-Apr-03 22:54

Hi,
Does anybody know why 'SetLayeredWindowAttributes' doesnt work on a docking bar? How can i use transparency on it?

Could anyone help me on this matter - I would be eternally grateful.

Thanks for your time.

Richard

PS. Example source code or just a nudge in the right direction would be great!;)

Re: Transparent Docking Bars

Joel Lucsy24-Apr-03 2:39

Joel Lucsy

24-Apr-03 2:39

Transparency only works with top-level windows.

Joel Lucsy

Re: Transparent Docking Bars

Richard Hudson24-Apr-03 4:34

Richard Hudson

24-Apr-03 4:34

Cheers. I thought so.
Just needed to make sure.

Thanks for your time!

Rich

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