Function to display the time.

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In my software(Built in Visual C++), the displayed time is wrong, i.e it is not updated to the daylight saving time.
I found the function that displays the date and time, but don't know how to put the clock one hour forward !

C++

void CPgInd::OnPoll(double time)
{
  if (m_hWnd)
  {
    CTm80 tm;
    tm = time;
    CString str = tm.Format(_T("%a %d/%m/%Y   %H:%M:%S"));

    m_timeStr = str;
    UpdCtrls(); 
  }
}// the format displayed is Thu 03/05/2012 9:46:23

Please help

Posted 2-May-12 3:28am

Sumal.V

Updated 2-May-12 23:50pm

v5

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Schehaider_Aymen 2-May-12 9:43am

what do you mean by update this ? the main function which displays the buttons/edit boxes or the function which displays the "wrong time"?

Sumal.V 2-May-12 9:46am

Nope I want to know the function that displays the time, so that I can modify to the current GMT....

Schehaider_Aymen 2-May-12 9:55am

I think that You have to locate the variable that is binded the control (which is used to display the time which i presume that it is an edit text) using the class wizard look for that variablle and try to find any call of it in your project; something like var.SetWindowText(....)

Sumal.V 2-May-12 10:02am

There are just 3 functions with SetWindowText and not time related!:(

5 solutions

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Pablo Aliskevicius · Answer 1 · 2012-05-02T04:17:00

Solution 2

The Windows API has two functions that return the time of day:
GetSystemTime and GetLocalTime[^].

You want to call GetLocalTime. GetSystemTime returns the UTC (Greenwich standard) time. In your meridian, this means you won't get the daylight savings time: in mine, a few hours off.

Hope this helps,

Pablo.

Posted 2-May-12 4:17am

Pablo Aliskevicius

Comments

Sumal.V 2-May-12 11:36am

I didn't quite get that! U mean I must display the local time?

Pablo Aliskevicius 2-May-12 14:56pm

Let's say you move to the West side of the Atlantic. When the 'system time' is noon, the 'local time' may be 8:00 am.
Also, the 'system time' does not provide for daylight savings. The 'local time' is the one you see in the Windows taskbar.
Best wishes,
Pablo.

Richard MacCutchan · Answer 2 · 2012-05-02T06:52:00

Solution 3

I cannot quite understand what your problem is but maybe you should be learning about the CRT Time functions[^].

Posted 2-May-12 6:52am

Richard MacCutchan

Comments

Pablo Aliskevicius 2-May-12 13:25pm

I'm a little aprehensive about functions like _localtime64(), that return pointers that it's not clear how or when they should be freed.
Just my two bits...

Richard MacCutchan 2-May-12 13:46pm

If you read the documentation it explains how.

Pablo Aliskevicius 2-May-12 14:56pm

You're right. Seen it now...
Thanks for the hint!

Schehaider_Aymen · Answer 3 · 2012-05-02T04:16:00

Solution 1

begin by looking for somthink like This:

in the current class (the one which hold the UI)

C++

DDX_Control(pDX, IDC_TIME_ACTIVEX, TIME_VAR);

in which

* IDC_TIME_ACTIVEX: is the name of the control on the UI.
* TIME_VAR : is the variable Name.

Then look for the TIME_VAR Calls you mau find one or more statements by which you display the time is some format.

Too, you may find something like :

C++

GetDlgItem(IDC_TIME_ACTIVEX)->SetWindowText(....)

if you find such statement you may look ine the formula passed to that function

Posted 2-May-12 4:16am

Schehaider_Aymen

Updated 2-May-12 4:17am

v2

Comments

Sumal.V 3-May-12 5:48am

At last I found the function that displays the time: But I don't know how to change. The time on software is 1 hour slow.
void CPgInd::OnPoll(double time)
{
if (m_hWnd)
{
CTm80 tm;
tm = time;
CString str = tm.Format(_T("%a %d/%m/%Y %H:%M:%S"));

m_timeStr = str;
UpdCtrls();
}
}// the format displayed is Thu 03/05/2012 9:46:23

Richard MacCutchan 3-May-12 7:09am

What is CTm80 and where does your time value come from?

Schehaider_Aymen 3-May-12 10:17am

I Suggest you to use the GetSystemTime function. which retrieves the current system date and time, expressed in UTC.

Or you may use GetLocalTime ( as pablo suggested you)

Sumal.V · Answer 4 · 2012-05-03T21:41:00

Solution 5

C#

Added +1 to the variable that holds hour.

Though this is a temporary solution,(Have to change this when the daylight saving ends) it solves my problem.

Posted 3-May-12 21:41pm

Sumal.V

vaibhavbvp · Answer 5 · 2012-05-03T23:06:00

Solution 6

you could use coledatetime stime = coledatetime::getcurrenttime();
noe you could format the stime as per your needs

Posted 3-May-12 23:06pm

vaibhavbvp

Function to display the time.

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Function to display the time.

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