Congrats BK - I don't know how to take a screen shot
Center the image on your monitor...you can enlarge the view if you like....hold down the Control Key and press the "PrtScrn/SysReq" key (it's generally on the top row of the keyboard on the far right side beside the Pause/Break key.
If you have a photoshop application in your programs, open it, select File/New...and then click Control-V. The image should appear on the blank screen. There you can crop it and size it. Generally, the width needs to be between 400 and 500. The guidelines here say no greater than 400, but the one I posted for BK is 450 wide. Save it as a .jpg file in your photos folder. And then you can post it to HHW.com.