[Closed] rendering progress

hi,:
I hope to get your guidance very much.i got some trouble.

This is code:

rollout progressTest "Progress Test" 
(
button maxquickrender "max 
quick render"
tooltip:"Render Progress  Dialog on"
 
 
on maxquickrender pressed do 
 (
  max  quick render
 )
 
---on renderproduction,I do not know the  rendering progress,I need the 
rendering progress-----------
button  renderproduction "render production"	
 
tooltip:"I do not know the rendering progress,I  need the rendering 
progress"
 
on renderproduction pressed do 
 
 
 
( 
 render production
)
 
---I need the rendering progress,like this 
 --------------------------------------------------------
 
progressbar doit_prog color:orange   height:8
--but I do not know how to express this  progress..
 
 
)
createDialog progressTest 200 80 -- create  a dialog to test

looking forward your help. Thank you so much!