This piece of code is to help you backup your clipboard data and restore it after you have finished other clipboard operations.
My experience: while I'm developing Word add-in programs, the icon of the new-added button can only be set through clipboard by "...
->PasteFace()". This will empty the clipboard data which is going to be pasted in Word. So, I wrote this class, and it helped me a lot.
// the constructor will do backup clipboard operation
// any other clipboard operations
By the way, my another article about another topic on another website :) :