It would be OK, if both processes share the time slices of one CPU.
The important part is, that one proccess uses CommTools to make communication via the serial ports. If have a few loops for retry in that procedure. Sometimes the program has to go through all the loops to complete the procedure and during that time I have a hour glass on the screen and the user can not make any entries.
What can I do to avoid this?

Thanks in advance
Angela