So this is basically about getting screenshots of VST GUIs ?
To do it manually:
Pressing Alt+PrtSc ("Druck" on German keyboards) captures a screenshot of the active window and puts it in the clipboard which then could be pasted to a graphics program like MS Paint or Photoshop and saved as image from there.
http://support.microsoft.com/kb/173884
Or lots of screenshot tools available.
https://www.techsupportalert.com/bes...re-utility.htm
If you want to it in a more automatic way, there's someone who did a automatic VST grabbing tool here (never tried it).
http://www.kvraudio.com/forum/viewto...5508&start=105
The links all are down unfortunately but maybe you have luck sending him a PM.
I hope I understood correctly what you want to do.