Adding upload functionality to plugin

Let's say you have found yourself a great Wordpress plugin, but the only thing that is missing is a way to easily upload and or pick images or other file formats. Well you start Googling to see what is already out there. I my case I stumbled upon a great article in Webmaster Source. In this article they explain how you can a/ load the needed scripts to work with a Wordpress media uploader and b/ how to add the html needed to invoke the media uploader and a way to designate a field to store the url to the image or filetype of your choice.

Create Meta Boxes for custom plugin

So you have just created you Wordpress Plugin Admininitrative page huh? But now that you got the functionality you were looking for working and you'd like to style it Wordpress style. And while you're at it you would like to make all your boxes to be just as flexible as all the Wordpress Dashboard widgets. I mean you want people to be able to move them around and fold them when they want to right? Blend them in, make them part of the whole Wordpress Dashboard.

Styling your plugin administrative page

So you start styling all your boxes using the appropriate Wordpress classes and ids

Turn page's boxes into Wordpress widgets

So you styled your admin pages boxes, but guess what? The boxes won't close! Nor can you move them around like you can with all the other boxes! Why? I mean you didn't change anything in the Wordpress admin nor did you delete vital files.