@Fernando - when you take a screenshot, the resolution is exactly the displayed resolution of the figure window - exactly the same number of pixels as displayed onscreen. To resize a figure, update its Position property. If you need a vectorized (scalable) image, then you should save the figure as an EPS/WMF and not use this utility.
Magnificent code Yair, thanks.
I have two questions. Is there a way to set the position (horizontally or vertically) and size of the figure for printing? and How can I increase the resolution of the jpg or png image?