use synchonized progress bar

can i create  or use an progress bar  between begin and end of an  execute query or execute process , by sinchronized... with the process and the query???

 

I all ready use  the progress bar of forms demos  but the problem is :

that I need to execute query and  and show progress bar in same time ......so  the advance of progress bar is sincrhonized

with the advance of the   loop . .....so

for example If I execute query , the time between suppose that is 3 seconds. and then the aplication charge the records on web...... I need to show the progress bar in this 3 seconds (for example)