There is an On Error, is there an On Event???? 1

[Japskunk72]

I have a function that watches harddrive changes and it often stalls waiting for a harddrive change, if there is no change i want to kill the function and re run it so it doenst keep hanging the system. Im looking for an on event (like when a counter counts so high or when a timer times out). Right now the Function just hangs untill a file is written. is there something to solve my problem?
Thanks
JT

 

[paulbent]

Have a look at the Timer control

Paul Bent
Northwind IT Systems

http://www.northwindit.co.uk

 

[Japskunk72]

What do you mean? How would i use the timer control to break a function? My function does have a loop, and i know how to break the loop and leave the function. but it hangs when it is waiting for a directory change. how would i break an event?

 

[strongm]

How are you watching for hard drive changes?

 

[Japskunk72]

I am using the ReadDirectoryChangesW.

 

[strongm]

I assume that you are actually using code based on my example in thread222-576673

This is a blocking, synchronous operation, in that it will wait - as you have discovered - until a change occurs. You either need to spawn the call in a new thread (my example code on this technique is in thread222-519374), or use the asynchronous version and then either poll the result of GetQueuedCompletionStatus or wait on a completion port using WaitForSingleObjectEx with a timeout applied

 

[strongm]

Erm..alternatively make it into a class, and put it into an ActiveX DLL that can raise an event

 

[Japskunk72]

Thanks Strongm,
So i could put it in a DLL, Use a public variable to let me know when it is watching and when it isnt? how do i kill the process of the function or the DLL if i think it has been waiting too long?

 

[Japskunk72]

Ok Thanks again Stronm,
I was reading backwords or something, I got what you are saying. I thought you ment instead of using GetQueuedCompletionStatus, you could use a ActiveX to raise the even.

So thanks alot!! That was exactly what i was looking for
JT