I found that construct 2 is very powerful
to tackle complex controls in the web design.
In fact, I love construct 2 as it gives me
a easy and powerful way to control the web.
I think construct 2 is not only limit in the game.
Therefore, I use construct 2 to design web base
business system. All is good except the web
application is needed to allow the users uploading
the PDF file for sharing.
Therefore, I do need a plugin for uploading the file.
That is my story.
[ I will spend some times to study how to write a plugin ]