Zlatko,

Another option is to use a timer that calls the program to read data from your com port. You can do this once a second or so without taking a lot of cpu cycles.


>I use PORT.DLL for writing or reading some data to or from COM port from my VFP app. It works fine, but now I have to do some changes with reading.
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>Well, reading COM port was a procedure user starts with click on button, the program opens com port, reads some bytes in a loop until some condition stops the procedure - like stopbyte comes or just a timeout. Now I have to do a program that should be able to read com port continuously all the time and react diferently on received bytes. It sounds to be like a windows service running in a background, but that's not the point.
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>So - when I make my program to read com port in a loop, it works, but the CPU usage jumps to 100% and there is a constant hourglass on, so it's not what I want. I looked some communication software like HyperTerminal, and it worked more calm, so it's possible, but how?
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>Is there any idea how to push the com port reading in a background of my VFP app?
>
>Thank's, Zlatko.