dodgy communication is back
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Thanks for all ur answers. I ve already tried to use another PC heaps of times, (and send everything to the hyperterminal). The communication between the hyperterm and the PC definitively works, I can receive/send data from/to the hyperterm.I ve also tried to use a sniffer when the hyperterm is connected to the external device and then compare with what my prog sends to this external device. And :(...I send exactly the same apart from setmask and waitonevent. But I do not think it makes any difference since the hyperterm uses an overlapped communication . I ve tried, as well, to use the acivex control provided by Visualc++ (MSCOMM32.ocx) and a couple of other activex controls found on the web. Can it be something at a lower level :confused: ?Like something wrong in window for instance? Thanks sysy