QProgressDialog accessibility issue

Platform
Windows XP
Platform details
HW platform: Genuine Intel 2140 @ 1.60 GHz, 3GB RAM
OS: Windows XP Professional Service Pack 3
Compilers
MSVC
Compiler details
Subject
QProgressDialog accessibility issue
Steps to reproduce / test case
1) Create a win32 application project with visual studio 2008 express edition.
2) Include the attached source files to the project.
3) Build the solution.
4) Run Jaws 9.0 or 10.0(screen reader), even in evaluation mode.
5) Run the compiled example.
More information
After executing the 5th step in the test case, the QProgressDialog (MyProgressDialog) object is not enough "accessible"; infact it's impossible to decide when or how to let the screen reader (Jaws) read the progressbar value (for instance every x seconds, or every x percentage increment, etc.). It seems also impossible to give the focus to the progressbar, or to choose the tab sequence of the widgets inside the MyProgressDialog object.