how to use prograssbar in a thread

[zl2k]

hi, there
I have a main program and from which dispatch 2 threads. The program within each thread is a loop and I do it in sequential. I need to use 2 prograssbar for each of the 4 thread by counting the steps if the loop. I tried to implement it but failed. (It's fine if not using thread). Can someone give me a hint? Thanks a lot.

I also have a prograssbar to monitor the threads. Each thread will send out signal to increase the bar when it is finshed. Again, this prograssbar's behavior is weird: when progressbar value changed, the bar did not increase immediately. At the end when all threads are finished, the bar shows 100% in text, but the bar itself is only 1/2 full.
zl