Autodesk Revit Architecture

[#1]

I would like to cut a void into the wall of a host window family. 

When I place a void in the family, it does not cut thought the wall.  

I tried making the void on a plane perpendicular and parallel to the wall plane.  I dont know if this has anything to do with how voids work.  But its not working. 

I also dont have an 'opening' element in the window family.  

help!

[#2]

Inside the project, try using Cut Geometry--select the wall, then the window family.

Does this work?

cheers