WindowsFormsHost is always the most top from WPF element

Question

how to set the z-index windowsformhost that they are not always at the top of the WPF element ?

Answer 1

According to MSDN (Layout Considerations for the WindowsFormsHost Element)

A hosted Windows Forms control is drawn in a separate HWND, so it is always drawn on top of WPF elements.

This is a design limitation

Another good article from MSDN that explains possible issues when using different graphical technologies in Windows is Technology Regions Overview

However googling I found that there seem to be some hackings for this (known as airspace restriction)

One hack (never tried it personally so not sure if it works) is at this link