Software needed for stopping the misuse of my printer+A4 sheet

[ishaagarwall]

I have some 5 computers all of them connected to a heavy duty printer ( The Xerox printer more precisely ).Lately there has been a tremendous increase in the consumption of A4 sheet and the ink cartridge simultaneously.I doubt that my employees are using the printer for their personal use,printing documents from the company's computer and hence misusing the same.Is there any way to check this ? See there are too many documents to be printed in our company in a day so the company provides the A4 sheet in bulk plus there couldn't be any authority to supervise the employees the whole day.In case there's any software which could help kindly mail back at ishaagarwall@yahoo.com

In short Software needed for the following

Screenshot maker which secretly takes the screen shot and stores it in a secret ( desired ) folder whenever ‘Print’ command is given.

Software which saves the document typed on either Microsoft Word or Adobe Acrobat and stores it in a secret folder whenever ‘Print’ command is given.