Screen Coordinates

Does anyone know of a method to return the Monitor's screen coordinates from a point location in a Rhino Viewport.

Basically, I would like to create a window's form element whose position on the screen is determined by a point in Grasshopper. 
I realize there are probably alot of complications surrounding implementing this, which viewport, what happens if the point is off screen, etc., but just wanted to know if it was generally possible and if so, how your might begin to approach the issue. Thanks!