Timer

[Castello07]

Hi to all... I want to create a timer in visual c++ (without using the class CWnd)that periodically send a message (for example a string). How is the best solution? I thought....create a thread that stay in sleep and after this time sleep send the message... I'll wait for any suggetion.. thanks!!

[led mike]

see the API CreateTimerQueueTimer

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led mike

[Roger Stoltz]

My suggestion is to use a waitable timer. You create a waitable timer with a call to ::CreateWaitableTimer()[^]. Wait for the timer to be signalled with ::WaitForSingleObject() or similar. If you're using a secondary thread you may want to stop the timer and exit the thread. I suggest you signal an event for that, created with ::CreateEvent(). Unless you're familiar with multithreading I suggest you read Joe Newcomer's article[^] on the subject to avoid the most common pitfalls, such as avoiding ::sleep() as the plague and never call GUI related stuff from a worker thread. Hope this helps -- Roger

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[SimonSays]

You could always try timeSetEvent to create a multimedia timer -- I have used that from time to time. That essentially creates the new thread for you and calls a function you specify when it times out. Saves you some of the details about thread management.

[MaxVampire82]

1. U can use the api : SetTimer() / KillTimer() 2. U can use the multimedia timer : timeSetEvent() / timeKillEvent() Chinese coder.

[ThatsAlok]

Castello07 wrote:

I thought....create a thread that stay in sleep and after this time sleep send the message...

I Believe that will be right way, as this will not interrupt your main thread when you call sleep function!

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cheers, Alok Gupta VC Forum Q&A :- I/ IV