Generating a image

Hello.

I am looking to generate a high quality image of the displayed part on the screen as it is shown on the screen but with a resolution higher than the windows size.

The goal here being able to make a high quality rendering of the view with all of its PMI.

I have the code to step threw each PMI view and make it displayed but the code to make a high quality output image at a higher resolution than the window has eluded me.