I admit, I don't know that one off the top of my head.  The page units  
property is for drawing (i.e. used with the Graphics class), while mouse  
events are part of the control/UI API (i.e. used with the Control class).

I realize those things seem connected, but in a lot of ways they aren't.  
There might be a method you can call that would transform pixel  
coordinates to millimeter coordinates without the use of a Graphics  
instance, but if there is I don't know about it.  And I don't think you  
want to be grabbing a Graphics instance every time you need to transform  
coordinates.

You may find that it makes more sense for you to handle the transformation  
directly.  Rather than setting the Graphics to use millimeters when you  
draw, instead create a Matrix representing the transformation you want,  
along with an inverse Matrix of that transformation.  Then when you draw,  
set the Graphics.Transform to the matrix, and when you want to map pixels  
back to millimeters, used the inverse transformation directly.

If no one else is able to answer your question but you do find a method  
already built in that does what you need, please follow-up here with that  
information.  I think I would have seen it if it exists, but there's no  
guarantee...I might have missed it, and obviously it'd be a useful thing  
to know.  :)

Pete

On Mar 10, 9:36 am, vicky87....@gmail.com wrote:

I don't think you can.  The PC has no way of telling whether it is
connected to a 15 inch LCD display, or a  projector that is producing
an image 15 feet across.