get image from resource file

[venerable bede]

I have an image called "imgUnableToDisplay" held in a resource file called "resImages" which is in the root of my application.

Can someone tell me how to get to it ?

I have tried :

System.Drawing.Image img = 
(System.Drawing.Image)Properties.Resources.ResourceManager.GetObject("imgUnableToDisplay");

and

System.Drawing.Image img = 
(System.Drawing.Image)Properties.Resources.ResourceManager.GetObject("resImages.imgUnableToDisplay");

but no joy.

Thanks In Advance