How to create a Form on top of SolidWorks in Add-In?

Hi all

I need to create a Form in my addin that will look and behave like i.e. detached toolbar (see attached picture).

It should be on top of SolidWorks only and support visual styles.

Currently, I'm using SetParent method to set SolidWorks window as parent Form, but even when double buffered, my Form is redrawing poorly.

Many thanks in advance!

SolidworksApi macros