How could I customise Microsoft Project workspace with addin.

Hi there,

I've been developing addin to MS Project 2013.

One of the features that I would like to implement is: Custom Charts on Project Workspace.

Generally, I would like to split the workspace into pieces and the top one I would use for my charts and the bottom one to standart Task Tree WBS view.

I've seen such view in MS Project already.

How could I do that?

Is there API or this is a just a Internet Explorer window there and I have to custumise the default HTML layout?

Thanks in advance,

Vlad.