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A real Timer
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De
03/09/1997 18:14:31
 
 
À
03/09/1997 10:57:06
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Titre:
Divers
Thread ID:
00048038
Message ID:
00048387
Vues:
47
Thanks. This is the text for which I've sent to the MS KB.

Vlad

>Hi Paul!
>
>This is what I've found in Win32 SDK about MM timers:
>
>Multimedia timer services allow applications to schedule timer events with
>the greatest resolution (or accuracy) possible for the hardware platform.
>These multimedia timer services allow you to schedule timer events at a
>higher resolution than other timer services.
>The multimedia timer services are useful for applications that demand
>high-resolution timing. For example, a MIDI sequencer requires a
>high-resolution timer because it must maintain the pace of MIDI events
>within a resolution of 1 millisecond.
>Applications that do not use high-resolution timing should use the SetTimer
>function instead of multimedia timer services. The timer services provided
>by SetTimer post WM_TIMER messages to a message queue; the multimedia timer
>services call a callback function. Applications that want a waitable timer
>should use the CreateWaitableTimer function.
>
>After reviewing all related topics I'm just realized that you cannot using
>this stuff directly from VFP without an additional tools like your Pointers
>class because it require pointers to callback functions.
>
>Have a happy day,
>Vladimir Shevchenko
>
>>
>> You may also take a look to multimedia timers. I know only that such an
>> "animal" exists, so I can't really help you. But maybe this is what you
>> need! :)
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