Callback event for modified text file

[Christopher Mitchell]

I am looking for a way to register, in LabVIEW, an event that signals when a text file has been changed by a 3rd party software. I could use the 'File/Directory Info' LV primitive in a loop to let me know when the file has been changed but that would be very inefficient. Does someone know of a COM object that would let me 'stream' the changes of the text file or that allowed me to register an ActiveX callback event?

[zou]

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@Archimedes wrote:
I am looking for a way to register, in LabVIEW, an event that signals when a text file has been changed by a 3rd party software. I could use the 'File/Directory Info' LV primitive in a loop to let me know when the file has been changed but that would be very inefficient. Does someone know of a COM object that would let me 'stream' the changes of the text file or that allowed me to register an ActiveX callback event?

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If you know C/C++ well, take a look Window API: FindFirstChangeNotification.
You can find it doc on MSDN.

George Zou
http://gtoolbox.yeah.net