Hello, There have been many questions about how to get screen captures from VMK. Here is how you do a screen capture. This is how I do it, and I'm sure that there are many other ways to do it, such as VMK Pal, which I have found is the easiest.
First, Get your screen that you want to "capture." Then, you press the "Prt Scrn" button. This is located over the insert button. Next, you paste onto a Paint program. You can then edit and crop your picture. Then, you simply save your picture.
WARNING: Screen Capture copies the whole computer screen. For some computers, if you press F11 while playing VMK it will only copy the VMK screen.
I hope his helped! Please reply to this or PM (private message) me if you need more help. Please also reply if you have found an easier way.