Hello:
Tks Chen for your kind answer. I get the idea and tested it. Something is not working but I'm not sure why. It´s mybe my code. I'll test further and post the results.
I couldn't find documentation on this function. It is not in the code - maybe in one of the libs - but I could not find any manual.
Can you tell me where can I find a description of this function.
Pedro A.