Everything there is made by my framework. The windows can be resized and moved, the menu's are working. The two windows show the curve editor, and my modelviewer.
I agree that it doens't look all that special at the moment due to its windows graphics. But that's just my art skills. All the code for drawing the GUI elements is localized in a single file. I'm using the visitor pattern to draw everything. Below is another picture using a different scheme to draw everything: