Pop-up Dialog Question

[Malek]

Hello everyone ..

I would like to inquire about how to create Pop-up Dialog in QT Creator 4 over Linux.
Or you can designate what I am asking : event and event handler.

I want to click on the Button, shows me another designed screen and block the main screen, pending the end user to enter data on-screen phenomenon.

I expect that it's not difficult, but I tried did not succeed, as well as I have downloaded some code from the forum (About Dialog ) , but when applied to a my program has had two errors !!

My program with two errors ..
http://up-arab.com/u_p/download.php?id=11910

Thank you

Malek

for adimn :is this the right location for this question?