There are many different way to do this:

first you could search for a screenshot program such as Grab clip save, which is available here...

or you could get into the sim, hit the printscreen button when youhave a desired view, shrink the sim, pull up a grpahic editor such as paint, and click paste...

this should copy the picture that you took into the program...

Now you have to worry about what file type to save it as, which is really a question of how big the file is allowed to be, and where you are going to post it.

Here at SimV you can only post *.jpg, and *.gif files for viewing.  they have to be under 100K, and less than 600pixels wide...

Hope this helps..