Trouble transforming desktop space to viewport space

Hey There.

New to UE and having trouble doing something simple…

I have debug drawing working so I can draw a rectangle where I want where (0,0) is the top left of the client
area and (viewport width, viewport height) is the bottom right.

I have a few touch regions set up in the content that are working as intended with touch events.

I want to visualize these regions by drawing from c++. It seems like I need to transform
MyGeometry.AbsolutePosition to viewport space. Tried using AbsoluteToViewport() but it doesn’t seem to
give me what I’m looking for.

Really I just need to see where my touch areas are as I resize the window etc.

Any ideas what I’m doing wrong?