DirectX Orthographic projection matrix?

I've managed to set the DirectX matrix so that I can render in 2D with a Z co-ordinate, however this is not orthographic as distant objects are projected from the center of the screen. How do I kill the perspective?

Here is the Matrix :-

                Local zf#=-.1,zn#=.1 ' Near and Far Z Range
		Local w# = width
		Local h# = height
		matrix=[..
		2.0/w	,0.0	,0.0		,0.0,..
		0.0	,-2.0/h	,0.0		,0.0,..
		0.0	,0.0	,1.0/(zn-zf)    ,1.0,..
		-1-(1.0/width),1+(1.0/height),zn/(zn-zf)	,1.0]

http://www.codeguru.com/Cpp/misc/misc/math/article.php/c10123__2/

Hopefully this will help you...

Thanks, that helped.