>
>How would you know if someone have already printed a document after viewing it in the report preview toolbar?

Not directly but you can create variable llPrinted in your program and set it to .T. in the report

* Report Summary band on Exit.
*_VFP.SetVar("llPrinted", WEXIST("Printing..."))
VFP.SetVar('lPrinted', SYS(2040)="2")
...
* Program
llPrinted = .F.
Report Form myreport to Printer Promp Preview
IF llPrinted
   ...
ENDIF