How to detect System Time Change in CompactFramewor k?

[José Joye]

In my application (written for Compact Framework 2.0 ), I have to be
informed whenever a system Time change occurs (NTP, daylight saving, ...).
Under the normal framework, I'm able to use the
"Microsoft.Win3 2.SystemEvents. TimeChanged" event. However, this is not
available under CF.

Any help welcome!

- José

There is a system event that fires (actually a pair, one for time, another
for time zone). You can P/Invokce CeRunAppAtEvent[1] and get them. They
are also wrapped in the OpenNETCF Smart Device Framework[2].
--

Chris Tacke, Embedded MVP
OpenNETCF Consulting
Managed Code in an Embedded World
www.OpenNETCF.com

[1] http://msdn2.microsoft.com/en-us/library/ms913956.aspx
[2]
http://blog.opennetcf.org/ctacke/Per...e3e7a9c3c.aspx

"José Joye" <[e-mail] te in message
news:46******** **************@ news.sunrise.ch ...

In my application (written for Compact Framework 2.0 ), I have to be
informed whenever a system Time change occurs (NTP, daylight saving, ...).
Under the normal framework, I'm able to use the
"Microsoft.Win3 2.SystemEvents. TimeChanged" event. However, this is not
available under CF.

Any help welcome!

- José

[=?Utf-8?B?ZGJncmljaw==?=]

Jose,
Here is some C# example code, I hope it helps:

[DllImport("core dll.dll", EntryPoint = "CreateEven t", SetLastError = true)]
private static extern IntPtr CreateEvent(Int Ptr lpEventAttribut es,
bool bManualReset,
bool bInitialState, string spName);

[DllImport("core dll.dll", EntryPoint = "WaitForSingleO bject",
SetLastError = true)]
private static extern int WaitForSingleOb ject(IntPtr hHandle, UInt32
dwMilliseconds) ;

[DllImport("core dll.dll", EntryPoint = "CloseHandl e", SetLastError =
true)]
private static extern bool CloseHandle(Int Ptr hHandle);

[DllImport("core dll.dll", EntryPoint = "CeRunAppAtEven t",
SetLastError = true)]
private static extern bool CeRunAppAtEvent (string pszAppName, long
lwichEvent);

private const int NOTIFICATION_EV ENT_TIME_CHANGE = 1;
private const UInt32 INFINITE = 0xFFFFFFFF;

public Form1()
{
InitializeCompo nent();
CeRunAppAtEvent ("\\\\.\\Notifi cations\\NamedE vents\\MyTimeNa medEvent",
NOTIFICATION_EV ENT_TIME_CHANGE );

Thread thread = new Thread(new ThreadStart(Thr eadProc));
thread.Start();
}

private void ThreadProc()
{
IntPtr hEvent = CreateEvent(Int Ptr.Zero, false, false,
"MyTimeNamedEve nt");

WaitForSingleOb ject(hEvent, INFINITE);

MessageBox.Show ("Time Event Occured");

CloseHandle(hEv ent);
}

Rick D.
Contractor
"José Joye" wrote:

In my application (written for Compact Framework 2.0 ), I have to be
informed whenever a system Time change occurs (NTP, daylight saving, ...).
Under the normal framework, I'm able to use the
"Microsoft.Win3 2.SystemEvents. TimeChanged" event. However, this is not
available under CF.

Any help welcome!

- José

[José Joye]

Thanks to both of you!

This is really usefull

- José
"dbgrick" <db*****@discus sions.microsoft .coma écrit dans le message de
news: 74************* *************** **...icrosof t.com...

Jose,
Here is some C# example code, I hope it helps:

[DllImport("core dll.dll", EntryPoint = "CreateEven t", SetLastError =
true)]
private static extern IntPtr CreateEvent(Int Ptr lpEventAttribut es,
bool bManualReset,
bool bInitialState, string spName);

[DllImport("core dll.dll", EntryPoint = "WaitForSingleO bject",
SetLastError = true)]
private static extern int WaitForSingleOb ject(IntPtr hHandle,
UInt32
dwMilliseconds) ;

[DllImport("core dll.dll", EntryPoint = "CloseHandl e", SetLastError
=
true)]
private static extern bool CloseHandle(Int Ptr hHandle);

[DllImport("core dll.dll", EntryPoint = "CeRunAppAtEven t",
SetLastError = true)]
private static extern bool CeRunAppAtEvent (string pszAppName, long
lwichEvent);

private const int NOTIFICATION_EV ENT_TIME_CHANGE = 1;
private const UInt32 INFINITE = 0xFFFFFFFF;

public Form1()
{
InitializeCompo nent();
CeRunAppAtEvent ("\\\\.\\Notifi cations\\NamedE vents\\MyTimeNa medEvent",
NOTIFICATION_EV ENT_TIME_CHANGE );

Thread thread = new Thread(new ThreadStart(Thr eadProc));
thread.Start();
}

private void ThreadProc()
{
IntPtr hEvent = CreateEvent(Int Ptr.Zero, false, false,
"MyTimeNamedEve nt");

WaitForSingleOb ject(hEvent, INFINITE);

MessageBox.Show ("Time Event Occured");

CloseHandle(hEv ent);
}

Rick D.
Contractor
"José Joye" wrote:

>In my application (written for Compact Framework 2.0 ), I have to be
informed whenever a system Time change occurs (NTP, daylight saving,
...).
Under the normal framework, I'm able to use the
"Microsoft.Win 32.SystemEvents .TimeChanged" event. However, this is not
available under CF.

Any help welcome!

- José